Log ruff/mypy/ShellCheck fixes (e0eae09) and Python 3.9 matrix
removal (92c5910) in BUGS.md fixed section; update TODO.md
last-updated line to reflect current CI status.
Add live and offline packet-parsing tests using paho-mqtt:
- tests/test_mqtt_live.py: schema validation + live integration tests;
subscribes to meshcore/SEA/+/packets; validates JSON against schema
- tests/mqtt_test_config.ini: broker/topic/timeout config; primary LAN
broker (10.0.2.123:1883); letsmesh as documented alternative
- tests/fixtures/mqtt_packets.json: 8 real packets from SEA region for
offline fallback
Run live: pytest -m mqtt
Run offline: pytest -m "not mqtt"
Collect fixtures: python tests/test_mqtt_live.py --collect-fixtures
Stacy Olivas