Firmware (state_machine.c):
- Add EVENT_BLE_INIT handler to SERIAL_BRIDGE state
-> transition back to RECEIVING for re-deploy
- Add EVENT_BLE_INIT handler to ERROR states
-> allows re-deploy from error without pressing Retry
Frontend (ble-deployer.ts):
- Add readValue() state poll for INIT and DATA commands
(same Android notify idle-drop bug affects these too)
- INIT success: firmware state >= 1 (RECEIVING+)
- DATA success: firmware state == 1 (RECEIVING)
- Error on state >= 5
