fix(sfm): /health reports the real service version, not a stale 0.1.0

terra-view's SFM Admin page (/admin/sfm) displays whatever /health returns for
`version`. That was hardcoded to "0.1.0" and never bumped, so the page showed
0.1.0 while the service was actually 0.26.0. Point both /health and the FastAPI
OpenAPI version at the release-bumped TOOL_VERSION (single source of truth), so
they can't drift again. Adds httpx-free regression tests (call health() directly).

Note: minimateplus.__version__ is separately stale at 0.1.0 — left as-is here
(nothing user-facing reads it; touching the package __init__ risks import order).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YDXjZCr4RqT2U3QvMDhgzf

sfm/server.py

@@ -67,6 +67,7 @@ from minimateplus.blastware_file import write_blastware_file, blastware_filename
 from minimateplus.client import _decode_a5_metadata_into, _decode_a5_waveform, _decode_event_count
 from minimateplus.framing import build_bw_write_frame, SESSION_RESET, POLL_PROBE, POLL_DATA
 from minimateplus.protocol import SUB_STOP_MONITORING
+from minimateplus.event_file_io import TOOL_VERSION as SFM_VERSION  # single source for the service version (release-bumped)
 from sfm import event_hdf5
 from sfm.cache import SFMCache, get_cache
 from sfm.database import SeismoDb
@@ -90,7 +91,7 @@ app = FastAPI(
         "Implements the minimateplus RS-232 protocol library.\n"
         "Proxied by terra-view at /api/sfm/*."
     ),
-    version="0.26.0",
+    version=SFM_VERSION,
 )
 
 # Allow requests from the waveform viewer opened as a local file (file://)
@@ -371,7 +372,7 @@ def _backfill_events(events: list, info: "DeviceInfo") -> None:
 @app.get("/health")
 def health() -> dict:
     """Service heartbeat.  No device I/O."""
-    return {"status": "ok", "service": "sfm", "version": "0.1.0"}
+    return {"status": "ok", "service": "sfm", "version": SFM_VERSION}
 
 
 @app.get("/", response_class=FileResponse)