- Added a new function `nws_http_means_no_coverage` to determine if NWS HTTP status codes indicate no coverage for a location.
- Updated `WxCommand` and `WeatherService` classes to utilize this function, improving error handling for NOAA alerts.
- Introduced a lazy loading mechanism for `_nws_alerts_available` to manage alert availability based on NWS coverage status.
- Enhanced logging to provide clearer warnings when NWS alerts are unavailable due to HTTP errors.