Separate BleBaroService so the HR strap and the barometer each hold their own GATT link and
work at the same time (one adapter, several LE connections). Verified on device against a PC
BlueZ emulator of the sensor: BleHR and BleBaro deliver in parallel, no cross-talk.
- BleBaroService: dedicated baro connection (scan-before-connect + direct-connect fallback,
ESS subscribe, writes ble_baro_data.json). MainActivity routes baro connects to it and
auto-connects both HR (ble_device.json) and baro (baro_device.json) at start.
- Rust: ble_baro_disconnect, ble_save_baro_device.
- Settings: a 'Датчики (BLE)' section - heart-rate and barometer as separate rows with their
own slots, bind/connect/unbind, and a live pressure/temperature/altitude readout.
- Tracking: altitude_baro_m stored per point, preferred in elevation stats (null without baro).
- Record screen: 'Высота' from the barometer (1 Hz, dot marker), temperature from the sensor.
- Fixes: direct-connect on scan timeout; Locale.US JSON (RU decimal comma broke the parse);
parsing routed by characteristic (baro no longer written into the pulse); VR/HR stop returns
to the tracks list instead of into details.
- tools/baro-sensor/emulate_baro.py: PC BlueZ peripheral that emulates the sensor for testing.
Emulator-verified only; real board still pending.
