Simplified the forecast schema

model/forecast.go

@@ -75,18 +75,8 @@ type WeatherForecastPeriod struct {
 	// Like WeatherObservation, this is required; use an “unknown” WMOCode if unmappable.
 	ConditionCode WMOCode `json:"conditionCode"`
 
-	// Provider-independent short text describing the conditions (normalized, if possible).
-	ConditionText string `json:"conditionText,omitempty"`
-
-	// Provider-specific “evidence” for troubleshooting mapping and drift.
-	ProviderRawDescription string `json:"providerRawDescription,omitempty"`
-
-	// Human-facing narrative. Not all providers supply rich text (Open-Meteo often won’t).
-	TextDescription string `json:"textDescription,omitempty"` // short phrase / summary
-	DetailedText    string `json:"detailedText,omitempty"`    // longer narrative, if available
-
-	// Provider-specific (legacy / transitional)
-	IconURL string `json:"iconUrl,omitempty"`
+	// Human-facing narrative summary for this period.
+	TextDescription string `json:"textDescription,omitempty"`
 
 	// Core predicted measurements (nullable; units align with WeatherObservation)
 	TemperatureC *float64 `json:"temperatureC,omitempty"`