integration
- Introduce HealthDiagnosticSensor for device health status reporting
- Add new constants and data keys for health sensor integration
- Wire health_sensor module into sensor platform setup
- Refactor sensor descriptions to improve derived sensor handling
- Implement pytest fixtures and comprehensive tests covering:
- Config flows and options validation
- Data reception and authentication
- Sensor platform setup and dynamic sensor addition
- Push integration with Pocasi.cz and Windy API
- Route dispatching and error handling
- Utilities, conversions, and translation functions