3.1.0

New

• Add /weatherSensorData, a compact endpoint for current, forecast, and historical weather values to be used used by OpenSprinkler firmware's WeatherSensor.
• Add selectable current, forecast, and historical scopes.
• Add persistent multi-day history for local personal weather stations.

Improvements

• Normalize historical observations into complete local calendar days, including daylight-saving transitions.
• Improve ETo calculation, validation, and handling of incomplete historical data.
• Improve weather-data normalization across Apple WeatherKit, Open-Meteo, DWD, AccuWeather,
  OpenWeather, Pirate Weather, Bright Sky, and Weather Underground.
• Share provider caches between adjustment, forecast, and weather-sensor requests.
• Coalesce concurrent cache misses to reduce duplicate provider requests.
• Improve geocoder cache persistence.
• Honor format=json for watering-adjustment error responses.
• Update the container runtime to Node.js 24.
• Expand API, configuration, provider, and testing documentation.

Fixes

• Allow Zimmerman calculations from local weather stations that do not report wind or solar
  radiation (#178).
• Restore support for configuring the server with the documented PORT environment variable
  (#179).
• Correct humidity, precipitation, wind, solar-radiation, and forecast normalization issues
  across multiple providers.
• Improve handling of missing, zero, stale, and malformed provider values.

Compatibility

Existing /0 through /3, /weatherData, and legacy weatherX.py routes remain supported.
Legacy watering-adjustment response formatting remains the default unless format=json is
requested.

Local weather persistence incorporates work proposed by @mpietruschka in #144 and @ruimarinho
in #150.

Full Changelog:
3.0.2...3.1.0