feat: implement geophone sensitivity and recording mode settings in compliance config

CHANGELOG.md

@@ -4,6 +4,34 @@ All notable changes to seismo-relay are documented here.
 
 ---
 
+## v0.12.2 — 2026-04-20
+
+### Added / Fixed
+
+- **Geophone sensitivity / maximum range field confirmed** — 4-20-26 geo sensitivity
+  captures (1.25 in/s vs 10 in/s) diffed across all three SUB 71 write chunks and both
+  E5 read payloads. The `geo_range` uint8 field per channel is now fully confirmed:
+  - E5 read offset: `channel_label + 33`; SUB 71 write offset: `channel_label + 29`
+  - `0x00` = Normal 10.000 in/s (standard gain); `0x01` = Sensitive 1.250 in/s (high gain)
+  - **Correction:** previous hypothesis (`channel_label+20`, `0x01`=Normal) was wrong.
+    `channel_label+20` reads `0x01` on ALL captures regardless of range — not this field.
+  - `_decode_compliance_config_into`: read offset corrected from `tran_pos+20` → `tran_pos+33`
+  - `_encode_compliance_config`: added `geo_range` parameter; writes to Tran/Vert/Long at `+29`
+  - `apply_config`: added `geo_range` parameter
+  - `POST /device/config`: added `geo_range` to `DeviceConfigBody`
+  - Web UI Config tab: added "Maximum Range — Geo" select (Normal / Sensitive)
+  - Web UI Device tab: added "Max Range (geo)" row to compliance table
+
+- **`recording_mode` + `histogram_interval_sec` confirmed and implemented** (4-20-26 captures)
+  - `recording_mode`: uint8 at anchor−8 (E5 read) / anchor−7 (write); enum: 0x00=Single Shot,
+    0x01=Continuous, 0x03=Histogram, 0x04=Histogram+Continuous
+  - `histogram_interval_sec`: uint16 BE seconds at anchor−4; same offset in read & write;
+    valid: 2, 5, 15, 60, 300, 900 (matching Blastware dropdown: 2s, 5s, 15s, 1m, 5m, 15m)
+  - Both fields added to `ComplianceConfig`, `_decode_compliance_config_into`,
+    `_encode_compliance_config`, `apply_config`, REST API body, and web UI
+
+---
+
 ## v0.12.1 — 2026-04-16
 
 ### Added