- Add info-level logging to all mobile websocket handle_in callbacks to track
incoming messages (subscribe_bounds, update_bounds, search_callsign, etc.)
- Create LogFilter plug to exclude K8s healthcheck requests from Phoenix logs
- Filter logs for /health, /ready, and / endpoints to reduce noise from
continuous healthcheck probes
- Configure Plug.Telemetry to use custom log level function
This eliminates noisy healthcheck logs while providing better visibility
into mobile websocket API usage.