v0.11.0 — SQLite persistence layer (SeismoDb)

sfm/database.py (new)
- SeismoDb class: three tables keyed by unit serial number
  - ach_sessions: one row per ACH call-home
  - events: one row per triggered event, deduped by (serial, waveform_key)
  - monitor_log: one row per monitoring interval, deduped by (serial, waveform_key)
- WAL mode, per-request connections, silent dedup via UNIQUE constraint
- Query helpers: query_events(), query_monitor_log(), get_sessions(), query_units()
- false_trigger flag on events for future review UI / report filtering

bridges/ach_server.py
- Import SeismoDb; create shared instance at startup pointed at
  bridges/captures/seismo_relay.db
- After each call-home: insert_events() + insert_monitor_log() + insert_ach_session()
- DB failures logged as warnings, never abort the session

sfm/server.py
- Import SeismoDb; lazy singleton via _get_db()
- New DB read endpoints: GET /db/units, /db/events, /db/monitor_log, /db/sessions
- PATCH /db/events/{id}/false_trigger for manual review flagging

CLAUDE.md / CHANGELOG.md
- Document DB schema, SFM DB endpoints, architecture decision (unit-keyed only)
- Version bump to v0.11.0

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CHANGELOG.md

@@ -4,6 +4,44 @@ All notable changes to seismo-relay are documented here.
 
 ---
 
+## v0.11.0 — 2026-04-13
+
+### Added
+
+- **`sfm/database.py` — SeismoDb** — SQLite persistence layer for all ACH data.
+  Three tables, all unit-keyed by serial number:
+  - `ach_sessions` — one row per inbound call-home: serial, timestamp, peer IP,
+    events_downloaded, monitor_entries, duration_seconds
+  - `events` — one row per triggered waveform event: serial, waveform_key (dedup),
+    timestamp, Tran/Vert/Long/VectorSum/Mic PPV, project/client/operator/sensor_location
+    strings, sample_rate, record_type, false_trigger flag
+  - `monitor_log` — one row per monitoring interval: serial, waveform_key (dedup),
+    start_time, stop_time, duration_seconds, geo_threshold_ips
+  - WAL mode, per-request connections — safe for the single-writer / occasional-reader
+    ACH server pattern
+  - Deduplication by `(serial, waveform_key)` UNIQUE constraint — re-runs and repeat
+    call-homes never produce duplicate rows
+
+- **`ach_server.py` — DB integration** — after each successful call-home, writes new
+  events and monitor log entries to `seismo_relay.db` then records the session in
+  `ach_sessions`.  DB write failures are logged as warnings and do not abort the session.
+
+- **`sfm/server.py` — DB read endpoints**:
+  - `GET /db/units` — distinct serials with last_seen, total_events, total_monitor_entries
+  - `GET /db/events` — query events with serial / date range / false_trigger filters
+  - `GET /db/monitor_log` — query monitoring intervals
+  - `GET /db/sessions` — query ACH call-home sessions
+  - `PATCH /db/events/{id}/false_trigger` — flag/unflag false triggers (for review UI)
+
+### Architecture
+
+- seismo-relay DB is unit-keyed only — no project concepts.  Project aggregation is
+  terra-view's responsibility via `UnitAssignment` / `DeploymentRecord` + date range
+  queries against the SFM DB endpoints.
+- DB file lives at `bridges/captures/seismo_relay.db` by default.
+
+---
+
 ## v0.10.0 — 2026-04-11
 
 ### Added

CLAUDE.md

@@ -416,6 +416,8 @@ for 0x10 records).
 
 ## SFM REST API (sfm/server.py)
 
+### Live device endpoints (connect to device per-request)
+
 ```
 GET  /device/info?port=COM5                              ← serial
 GET  /device/info?host=1.2.3.4&tcp_port=9034            ← cellular
@@ -428,6 +430,19 @@ POST /device/monitor/stop?host=1.2.3.4&tcp_port=9034    ← stop recording
 
 Server retries once on `ProtocolError` for TCP connections (handles cold-boot timing).
 
+### DB read endpoints (query seismo_relay.db written by ach_server.py)
+
+```
+GET  /db/units                                           ← all known serials + summary stats
+GET  /db/events?serial=BE11529&from_dt=&to_dt=&limit=   ← triggered events, newest first
+GET  /db/monitor_log?serial=BE11529&from_dt=&to_dt=     ← monitoring intervals, newest first
+GET  /db/sessions?serial=BE11529&limit=50               ← ACH call-home sessions, newest first
+PATCH /db/events/{id}/false_trigger?value=true          ← flag/unflag false triggers
+```
+
+DB file: `bridges/captures/seismo_relay.db` (default; override with `--db-path` at startup).
+All DB endpoints are read-only except `PATCH /db/events/{id}/false_trigger`.
+
 ---
 
 ## Key wire captures (reference material)

bridges/ach_server.py

@@ -68,6 +68,7 @@ sys.path.insert(0, str(Path(__file__).parent.parent))
 from minimateplus.transport import SocketTransport
 from minimateplus.client import MiniMateClient
 from minimateplus.models import DeviceInfo, Event, MonitorLogEntry
+from sfm.database import SeismoDb
 
 log = logging.getLogger("ach_server")
 
@@ -136,6 +137,7 @@ class AchSession:
         events_only: bool,
         max_events: Optional[int],
         state_path: Path,
+        db: "SeismoDb",
         clear_after_download: bool = False,
     ) -> None:
         self.sock                 = sock
@@ -145,6 +147,7 @@ class AchSession:
         self.events_only          = events_only
         self.max_events           = max_events
         self.state_path           = state_path
+        self.db                   = db
         self.clear_after_download = clear_after_download
 
     def run(self) -> None:
@@ -408,6 +411,30 @@ class AchSession:
                         exc,
                     )
 
+                # ── Persist to SQLite DB ─────────────────────────────────────
+                _session_start = datetime.datetime.now()
+                try:
+                    _ev_ins, _ev_skip = self.db.insert_events(
+                        new_events, serial=serial or self.peer, session_id=None
+                    )
+                    _ml_ins, _ml_skip = self.db.insert_monitor_log(
+                        new_monitor_entries, session_id=None
+                    )
+                    _session_id = self.db.insert_ach_session(
+                        serial=serial or self.peer,
+                        peer=self.peer,
+                        events_downloaded=_ev_ins,
+                        monitor_entries=_ml_ins,
+                        duration_seconds=(datetime.datetime.now() - _session_start).total_seconds(),
+                        session_time=_session_start,
+                    )
+                    log.info(
+                        "  [DB] session=%s  events +%d (skip %d)  monitor +%d (skip %d)",
+                        _session_id[:8], _ev_ins, _ev_skip, _ml_ins, _ml_skip,
+                    )
+                except Exception as exc:
+                    log.warning("  [WARN] DB write failed: %s -- continuing", exc)
+
                 # ── Optional: erase device memory after successful download ────
                 erased_successfully = False
                 if self.clear_after_download and new_events:
@@ -549,6 +576,7 @@ def serve(args: argparse.Namespace) -> None:
     output_dir = Path(args.output)
     output_dir.mkdir(parents=True, exist_ok=True)
     state_path = output_dir / "ach_state.json"
+    db = SeismoDb(output_dir / "seismo_relay.db")
 
     server_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
     server_sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
@@ -601,6 +629,7 @@ def serve(args: argparse.Namespace) -> None:
                     events_only=args.events_only,
                     max_events=max_ev,
                     state_path=state_path,
+                    db=db,
                     clear_after_download=args.clear_after_download,
                 )
                 t = threading.Thread(target=session.run, daemon=True, name=f"ach-{peer}")

sfm/database.py

@@ -0,0 +1,406 @@
+"""
+sfm/database.py — SQLite persistence layer for seismo-relay.
+
+Three tables, all keyed by unit serial number:
+
+  ach_sessions   — one row per inbound ACH call-home
+  events         — one row per triggered waveform event (deduped by serial+key)
+  monitor_log    — one row per monitoring interval (deduped by serial+key)
+
+The DB file lives at:
+  <output_dir>/seismo_relay.db     (default: bridges/captures/seismo_relay.db)
+
+Usage
+-----
+  from sfm.database import SeismoDb
+
+  db = SeismoDb("bridges/captures/seismo_relay.db")
+
+  # Write a call-home session
+  session_id = db.insert_ach_session(serial="BE11529", peer="1.2.3.4:51920",
+                                     events_downloaded=3, monitor_entries=2,
+                                     duration_seconds=47.3)
+
+  # Write events (silently skips duplicates)
+  db.insert_events(events, serial="BE11529", session_id=session_id)
+
+  # Write monitor log entries
+  db.insert_monitor_log(entries, session_id=session_id)
+
+  # Query
+  rows = db.query_events(serial="BE11529", from_dt=datetime(...), to_dt=datetime(...))
+"""
+
+from __future__ import annotations
+
+import datetime
+import logging
+import sqlite3
+import uuid
+from pathlib import Path
+from typing import Optional
+
+from minimateplus.models import Event, MonitorLogEntry
+
+log = logging.getLogger("sfm.database")
+
+# ── Schema ─────────────────────────────────────────────────────────────────────
+
+_SCHEMA = """
+PRAGMA journal_mode = WAL;
+PRAGMA foreign_keys = ON;
+
+CREATE TABLE IF NOT EXISTS ach_sessions (
+    id                      TEXT PRIMARY KEY,       -- UUID
+    serial                  TEXT NOT NULL,
+    session_time            TEXT NOT NULL,          -- ISO-8601 UTC
+    peer                    TEXT,                   -- "ip:port"
+    events_downloaded       INTEGER NOT NULL DEFAULT 0,
+    monitor_entries         INTEGER NOT NULL DEFAULT 0,
+    duration_seconds        REAL,
+    created_at              TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%SZ', 'now'))
+);
+CREATE INDEX IF NOT EXISTS idx_ach_sessions_serial ON ach_sessions(serial);
+CREATE INDEX IF NOT EXISTS idx_ach_sessions_time   ON ach_sessions(session_time);
+
+CREATE TABLE IF NOT EXISTS events (
+    id                      TEXT PRIMARY KEY,       -- UUID
+    serial                  TEXT NOT NULL,
+    waveform_key            TEXT NOT NULL,          -- 8-hex device key (dedup field)
+    session_id              TEXT,                   -- FK → ach_sessions.id
+    timestamp               TEXT,                   -- ISO-8601 local time from device
+    tran_ppv                REAL,                   -- in/s
+    vert_ppv                REAL,                   -- in/s
+    long_ppv                REAL,                   -- in/s
+    peak_vector_sum         REAL,                   -- in/s
+    mic_ppv                 REAL,                   -- psi or dB depending on setup
+    project                 TEXT,
+    client                  TEXT,
+    operator                TEXT,
+    sensor_location         TEXT,
+    sample_rate             INTEGER,
+    record_type             TEXT,                   -- "single_shot" | "continuous"
+    false_trigger           INTEGER NOT NULL DEFAULT 0,  -- 0=no, 1=yes (manual flag)
+    created_at              TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
+    UNIQUE(serial, waveform_key)
+);
+CREATE INDEX IF NOT EXISTS idx_events_serial    ON events(serial);
+CREATE INDEX IF NOT EXISTS idx_events_timestamp ON events(timestamp);
+CREATE INDEX IF NOT EXISTS idx_events_session   ON events(session_id);
+
+CREATE TABLE IF NOT EXISTS monitor_log (
+    id                      TEXT PRIMARY KEY,       -- UUID
+    serial                  TEXT NOT NULL,
+    waveform_key            TEXT NOT NULL,          -- 8-hex device key (dedup field)
+    session_id              TEXT,                   -- FK → ach_sessions.id
+    start_time              TEXT,                   -- ISO-8601
+    stop_time               TEXT,                   -- ISO-8601
+    duration_seconds        REAL,
+    geo_threshold_ips       REAL,                   -- in/s
+    created_at              TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
+    UNIQUE(serial, waveform_key)
+);
+CREATE INDEX IF NOT EXISTS idx_monitor_log_serial ON monitor_log(serial);
+CREATE INDEX IF NOT EXISTS idx_monitor_log_start  ON monitor_log(start_time);
+CREATE INDEX IF NOT EXISTS idx_monitor_log_session ON monitor_log(session_id);
+"""
+
+
+# ── SeismoDb class ─────────────────────────────────────────────────────────────
+
+class SeismoDb:
+    """
+    Thin SQLite wrapper for seismo-relay persistence.
+
+    Thread-safe: each call opens, uses, and closes a connection with
+    check_same_thread=False and WAL mode enabled.  For the ACH server's
+    single-writer / occasional-reader pattern this is more than sufficient.
+    """
+
+    def __init__(self, db_path: str | Path) -> None:
+        self.db_path = Path(db_path)
+        self.db_path.parent.mkdir(parents=True, exist_ok=True)
+        self._init_schema()
+        log.info("SeismoDb initialised at %s", self.db_path)
+
+    # ── Internal helpers ───────────────────────────────────────────────────────
+
+    def _connect(self) -> sqlite3.Connection:
+        conn = sqlite3.connect(str(self.db_path), check_same_thread=False)
+        conn.row_factory = sqlite3.Row
+        conn.execute("PRAGMA journal_mode = WAL")
+        conn.execute("PRAGMA foreign_keys = ON")
+        return conn
+
+    def _init_schema(self) -> None:
+        with self._connect() as conn:
+            conn.executescript(_SCHEMA)
+
+    @staticmethod
+    def _iso(dt: Optional[datetime.datetime]) -> Optional[str]:
+        return dt.isoformat() if dt is not None else None
+
+    @staticmethod
+    def _new_id() -> str:
+        return str(uuid.uuid4())
+
+    # ── ACH sessions ──────────────────────────────────────────────────────────
+
+    def insert_ach_session(
+        self,
+        *,
+        serial: str,
+        peer: Optional[str] = None,
+        events_downloaded: int = 0,
+        monitor_entries: int = 0,
+        duration_seconds: Optional[float] = None,
+        session_time: Optional[datetime.datetime] = None,
+    ) -> str:
+        """Insert a new ACH session row. Returns the new session UUID."""
+        sid = self._new_id()
+        ts  = self._iso(session_time or datetime.datetime.utcnow())
+        with self._connect() as conn:
+            conn.execute(
+                """
+                INSERT INTO ach_sessions
+                    (id, serial, session_time, peer,
+                     events_downloaded, monitor_entries, duration_seconds)
+                VALUES (?, ?, ?, ?, ?, ?, ?)
+                """,
+                (sid, serial, ts, peer,
+                 events_downloaded, monitor_entries, duration_seconds),
+            )
+        log.debug("ach_session inserted: %s serial=%s events=%d monitor=%d",
+                  sid, serial, events_downloaded, monitor_entries)
+        return sid
+
+    def get_sessions(
+        self,
+        serial: Optional[str] = None,
+        limit: int = 50,
+    ) -> list[dict]:
+        """Return recent ACH sessions, newest first."""
+        with self._connect() as conn:
+            if serial:
+                rows = conn.execute(
+                    "SELECT * FROM ach_sessions WHERE serial=? "
+                    "ORDER BY session_time DESC LIMIT ?",
+                    (serial, limit),
+                ).fetchall()
+            else:
+                rows = conn.execute(
+                    "SELECT * FROM ach_sessions ORDER BY session_time DESC LIMIT ?",
+                    (limit,),
+                ).fetchall()
+        return [dict(r) for r in rows]
+
+    # ── Events ────────────────────────────────────────────────────────────────
+
+    def insert_events(
+        self,
+        events: list[Event],
+        *,
+        serial: str,
+        session_id: Optional[str] = None,
+    ) -> tuple[int, int]:
+        """
+        Insert triggered events. Silently skips duplicates (serial+waveform_key).
+        Returns (inserted, skipped).
+        """
+        inserted = skipped = 0
+        with self._connect() as conn:
+            for ev in events:
+                key = ev._waveform_key.hex() if ev._waveform_key else None
+                if key is None:
+                    skipped += 1
+                    continue
+
+                ts  = None
+                if ev.timestamp:
+                    try:
+                        ts = datetime.datetime(
+                            ev.timestamp.year, ev.timestamp.month, ev.timestamp.day,
+                            ev.timestamp.hour, ev.timestamp.minute, ev.timestamp.second,
+                        ).isoformat()
+                    except Exception:
+                        ts = str(ev.timestamp)
+
+                pv  = ev.peak_values
+                pi  = ev.project_info
+
+                try:
+                    conn.execute(
+                        """
+                        INSERT INTO events
+                            (id, serial, waveform_key, session_id, timestamp,
+                             tran_ppv, vert_ppv, long_ppv, peak_vector_sum, mic_ppv,
+                             project, client, operator, sensor_location,
+                             sample_rate, record_type)
+                        VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+                        """,
+                        (
+                            self._new_id(), serial, key, session_id, ts,
+                            pv.tran  if pv else None,
+                            pv.vert  if pv else None,
+                            pv.long  if pv else None,
+                            pv.peak_vector_sum if pv else None,
+                            pv.micl  if pv else None,
+                            pi.project         if pi else None,
+                            pi.client          if pi else None,
+                            pi.operator        if pi else None,
+                            pi.sensor_location if pi else None,
+                            ev.sample_rate,
+                            ev.record_type,
+                        ),
+                    )
+                    inserted += 1
+                except sqlite3.IntegrityError:
+                    skipped += 1
+
+        log.debug("insert_events serial=%s inserted=%d skipped=%d",
+                  serial, inserted, skipped)
+        return inserted, skipped
+
+    def query_events(
+        self,
+        serial: Optional[str] = None,
+        from_dt: Optional[datetime.datetime] = None,
+        to_dt: Optional[datetime.datetime] = None,
+        false_trigger: Optional[bool] = None,
+        limit: int = 500,
+        offset: int = 0,
+    ) -> list[dict]:
+        """Query events with optional filters. Returns newest first."""
+        clauses: list[str] = []
+        params:  list      = []
+
+        if serial:
+            clauses.append("serial = ?")
+            params.append(serial)
+        if from_dt:
+            clauses.append("timestamp >= ?")
+            params.append(from_dt.isoformat())
+        if to_dt:
+            clauses.append("timestamp <= ?")
+            params.append(to_dt.isoformat())
+        if false_trigger is not None:
+            clauses.append("false_trigger = ?")
+            params.append(1 if false_trigger else 0)
+
+        where = ("WHERE " + " AND ".join(clauses)) if clauses else ""
+        params += [limit, offset]
+
+        with self._connect() as conn:
+            rows = conn.execute(
+                f"SELECT * FROM events {where} "
+                f"ORDER BY timestamp DESC LIMIT ? OFFSET ?",
+                params,
+            ).fetchall()
+        return [dict(r) for r in rows]
+
+    def set_false_trigger(self, event_id: str, value: bool) -> bool:
+        """Set or clear the false_trigger flag on an event. Returns True if found."""
+        with self._connect() as conn:
+            cur = conn.execute(
+                "UPDATE events SET false_trigger=? WHERE id=?",
+                (1 if value else 0, event_id),
+            )
+        return cur.rowcount > 0
+
+    # ── Monitor log ───────────────────────────────────────────────────────────
+
+    def insert_monitor_log(
+        self,
+        entries: list[MonitorLogEntry],
+        *,
+        session_id: Optional[str] = None,
+    ) -> tuple[int, int]:
+        """
+        Insert monitor log entries. Silently skips duplicates (serial+waveform_key).
+        Returns (inserted, skipped).
+        """
+        inserted = skipped = 0
+        with self._connect() as conn:
+            for e in entries:
+                try:
+                    conn.execute(
+                        """
+                        INSERT INTO monitor_log
+                            (id, serial, waveform_key, session_id,
+                             start_time, stop_time, duration_seconds,
+                             geo_threshold_ips)
+                        VALUES (?, ?, ?, ?, ?, ?, ?, ?)
+                        """,
+                        (
+                            self._new_id(),
+                            e.serial or "",
+                            e.key,
+                            session_id,
+                            self._iso(e.start_time),
+                            self._iso(e.stop_time),
+                            e.duration_seconds,
+                            e.geo_threshold_ips,
+                        ),
+                    )
+                    inserted += 1
+                except sqlite3.IntegrityError:
+                    skipped += 1
+
+        log.debug("insert_monitor_log inserted=%d skipped=%d", inserted, skipped)
+        return inserted, skipped
+
+    def query_monitor_log(
+        self,
+        serial: Optional[str] = None,
+        from_dt: Optional[datetime.datetime] = None,
+        to_dt: Optional[datetime.datetime] = None,
+        limit: int = 500,
+        offset: int = 0,
+    ) -> list[dict]:
+        """Query monitor log entries with optional filters. Returns newest first."""
+        clauses: list[str] = []
+        params:  list      = []
+
+        if serial:
+            clauses.append("serial = ?")
+            params.append(serial)
+        if from_dt:
+            clauses.append("start_time >= ?")
+            params.append(from_dt.isoformat())
+        if to_dt:
+            clauses.append("start_time <= ?")
+            params.append(to_dt.isoformat())
+
+        where = ("WHERE " + " AND ".join(clauses)) if clauses else ""
+        params += [limit, offset]
+
+        with self._connect() as conn:
+            rows = conn.execute(
+                f"SELECT * FROM monitor_log {where} "
+                f"ORDER BY start_time DESC LIMIT ? OFFSET ?",
+                params,
+            ).fetchall()
+        return [dict(r) for r in rows]
+
+    # ── Fleet overview ────────────────────────────────────────────────────────
+
+    def query_units(self) -> list[dict]:
+        """
+        Return one row per known serial with summary stats:
+        last_seen, total_events, total_monitor_entries.
+        """
+        with self._connect() as conn:
+            rows = conn.execute(
+                """
+                SELECT
+                    s.serial,
+                    MAX(s.session_time)  AS last_seen,
+                    SUM(s.events_downloaded)  AS total_events,
+                    SUM(s.monitor_entries)    AS total_monitor_entries,
+                    COUNT(*)                  AS total_sessions
+                FROM ach_sessions s
+                GROUP BY s.serial
+                ORDER BY last_seen DESC
+                """
+            ).fetchall()
+        return [dict(r) for r in rows]

sfm/server.py

@@ -34,6 +34,7 @@ or:
 
 from __future__ import annotations
 
+import datetime
 import logging
 import sys
 from pathlib import Path
@@ -59,6 +60,7 @@ from minimateplus.protocol import ProtocolError
 from minimateplus.models import ComplianceConfig, DeviceInfo, Event, PeakValues, ProjectInfo, Timestamp
 from minimateplus.transport import TcpTransport, DEFAULT_TCP_PORT
 from sfm.cache import SFMCache, get_cache
+from sfm.database import SeismoDb
 
 logging.basicConfig(
     level=logging.INFO,
@@ -89,6 +91,21 @@ app.add_middleware(
 )
 
 
+# ── DB ────────────────────────────────────────────────────────────────────────
+# Shared SeismoDb instance.  Path can be overridden by --db-path at startup,
+# or defaults to bridges/captures/seismo_relay.db relative to the repo root.
+
+_DEFAULT_DB_PATH = Path(__file__).parent.parent / "bridges" / "captures" / "seismo_relay.db"
+_db: Optional[SeismoDb] = None
+
+
+def _get_db() -> SeismoDb:
+    global _db
+    if _db is None:
+        _db = SeismoDb(_DEFAULT_DB_PATH)
+    return _db
+
+
 # ── Serialisers ────────────────────────────────────────────────────────────────
 # Plain dict helpers — avoids a Pydantic dependency in the library layer.
 
@@ -929,6 +946,108 @@ def cache_clear_device(
     return {"status": "cleared", "conn_key": conn_key, "deleted": counts}
 
 
+# ── DB read endpoints ─────────────────────────────────────────────────────────
+#
+# These endpoints expose the seismo-relay SQLite DB written by ach_server.py.
+# All queries are read-only.  Terra-view calls these to build project event
+# views, unit history panels, and (eventually) vibration summary reports.
+
+
+@app.get("/db/units")
+def db_units() -> list[dict]:
+    """
+    Return one row per known serial with summary stats:
+    last_seen, total_events, total_monitor_entries, total_sessions.
+    """
+    return _get_db().query_units()
+
+
+@app.get("/db/events")
+def db_events(
+    serial:        Optional[str]  = Query(None,  description="Filter by unit serial (e.g. BE11529)"),
+    from_dt:       Optional[str]  = Query(None,  description="ISO-8601 start datetime (inclusive)"),
+    to_dt:         Optional[str]  = Query(None,  description="ISO-8601 end datetime (inclusive)"),
+    false_trigger: Optional[bool] = Query(None,  description="Filter by false_trigger flag"),
+    limit:         int            = Query(500,   description="Max rows to return (default 500)"),
+    offset:        int            = Query(0,     description="Pagination offset"),
+) -> dict:
+    """
+    Query triggered events from the DB.
+
+    Returns events newest-first.  All filter params are optional.
+
+    Example:
+        GET /db/events?serial=BE11529&from_dt=2026-04-01&limit=100
+    """
+    from_parsed = datetime.datetime.fromisoformat(from_dt) if from_dt else None
+    to_parsed   = datetime.datetime.fromisoformat(to_dt)   if to_dt   else None
+
+    rows = _get_db().query_events(
+        serial=serial,
+        from_dt=from_parsed,
+        to_dt=to_parsed,
+        false_trigger=false_trigger,
+        limit=limit,
+        offset=offset,
+    )
+    return {"count": len(rows), "events": rows}
+
+
+@app.patch("/db/events/{event_id}/false_trigger")
+def db_set_false_trigger(
+    event_id: str,
+    value:    bool = Query(..., description="True to flag as false trigger, False to clear"),
+) -> dict:
+    """
+    Set or clear the false_trigger flag on a single event.
+
+    Used by the terra-view event review UI.
+    Returns 404 if the event_id is not found.
+    """
+    found = _get_db().set_false_trigger(event_id, value)
+    if not found:
+        raise HTTPException(status_code=404, detail=f"Event {event_id} not found")
+    return {"status": "ok", "event_id": event_id, "false_trigger": value}
+
+
+@app.get("/db/monitor_log")
+def db_monitor_log(
+    serial:  Optional[str] = Query(None, description="Filter by unit serial"),
+    from_dt: Optional[str] = Query(None, description="ISO-8601 start datetime (inclusive)"),
+    to_dt:   Optional[str] = Query(None, description="ISO-8601 end datetime (inclusive)"),
+    limit:   int           = Query(500,  description="Max rows to return"),
+    offset:  int           = Query(0,    description="Pagination offset"),
+) -> dict:
+    """
+    Query monitor log entries (continuous monitoring intervals) from the DB.
+
+    Returns entries newest-first.
+    """
+    from_parsed = datetime.datetime.fromisoformat(from_dt) if from_dt else None
+    to_parsed   = datetime.datetime.fromisoformat(to_dt)   if to_dt   else None
+
+    rows = _get_db().query_monitor_log(
+        serial=serial,
+        from_dt=from_parsed,
+        to_dt=to_parsed,
+        limit=limit,
+        offset=offset,
+    )
+    return {"count": len(rows), "entries": rows}
+
+
+@app.get("/db/sessions")
+def db_sessions(
+    serial: Optional[str] = Query(None, description="Filter by unit serial"),
+    limit:  int           = Query(50,   description="Max rows to return"),
+) -> dict:
+    """
+    Query ACH call-home sessions from the DB, newest first.
+    """
+    rows = _get_db().get_sessions(serial=serial, limit=limit)
+    return {"count": len(rows), "sessions": rows}
+
+
 # ── Entry point ────────────────────────────────────────────────────────────────
 
 if __name__ == "__main__":