When Home Assistant becomes unreachable (WiFi dropout, HA restart, etc.),
the module now:
- Detects connectivity errors (ENETUNREACH, timeout, etc.)
- Opens a circuit breaker that stops ALL template evaluations immediately
- Runs a single coalesced health check with exponential backoff (15s→300s)
- Queues pending evaluations and replays them when HA comes back
- Suppresses error log spam while circuit is open
Previously, each of the 11 sections would independently fail + retry,
flooding the event loop with 30+ error callbacks in the same millisecond
and freezing Electron's renderer.
Fixes repeated MagicMirror freezes during transient network outages.
The conditional config.debuglogging checks were not working reliably
in node_helper context. Removed debug logging from onStateChangedEvent
entirely (it fires on every entity state change - multiple times per
second for power sensors). WS disconnect promoted to info level since
it's actually useful.
- Add 10 second timeout to template evaluation HTTP calls
- Add retry logic that schedules retry after 30 seconds on failure
- Maintains existing error handling while preventing silent failures
- Fixes issue where template errors cause data to stay stale until next WebSocket event
