- Introduced a new `_utc_now` function in `maintenance.py` to standardize UTC time retrieval, replacing deprecated `utcnow()` calls.
- Updated all instances of `datetime.utcnow()` in `maintenance.py` to use the new `_utc_now` function for consistency.
- Modified `app.py` in the web viewer to use `datetime.now(timezone.utc)` instead of `datetime.utcnow()`, ensuring timezone awareness.
- Enhanced MQTT test suite with new v2 callback methods for improved connection handling and error reporting.
agessaman
4a37b9179a