The venv is a per-machine artifact and stays out of git; the bats
auto-create it on first run but only installed bleak - pyserial
(required by UART OTA) was missing on a fresh machine. Both bats now
install from requirements-ble.txt (bleak==3.0.2, pyserial==3.5).
- app_ota.c: after END ok, wait until the RSP is consumed by the host
(BLE e0005 read-out / UART TX done) plus 300ms grace before resetting,
2s timeout fallback; polled from the BLE schedule task (rwip_schedule
must keep running for the ATT read to be processed)
- main.c: app_ota_reset_poll() in the BLE schedule task loop
- docs: ble_protocol.md 6.6 note, dev log section 43, AGENTS.md sync
