fix: Fix syntax errors, wire config-driven simulation in run.py, and correct fault-rate/availability KPI bugs

pvsim/weather.py

@@ -917,4 +917,49 @@ class WeatherModel:
             f"rain="
             f"{self.rain_enabled})"
         )
-```
+
+    @classmethod
+    def from_config(
+        cls,
+        config: Dict,
+        sun: SunModel
+    ) -> WeatherModel:
+        """
+        Crea un'istanza di WeatherModel da un dizionario di configurazione.
+        """
+
+        weather_data = config['weather']
+
+        return cls(
+            sun=sun,
+            clear_sky_model=weather_data['clear_sky_model'],
+            mean_annual_temperature_C=weather_data['temperature']['mean_annual_C'],
+            daily_temperature_variation_C=weather_data['temperature']['daily_variation_C'],
+            seasonal_temperature_variation_C=weather_data['temperature'].get('seasonal_variation_C', 12.0),
+            cloud_enabled=weather_data['clouds']['enabled'],
+            mean_cloud_factor=weather_data['clouds']['mean_cloud_factor'],
+            cloud_variability=weather_data['clouds']['random_variability'],
+            rain_enabled=weather_data['rain']['enabled'],
+            rain_probability_daily=weather_data['rain']['probability_daily'],
+        )
+    
+    @classmethod
+    def from_json(
+        cls,
+        json_path: str,
+        sun: SunModel
+    ) -> WeatherModel:
+        """
+        Crea un'istanza di WeatherModel da un file JSON.
+        """
+
+        import json
+
+        with open(json_path, 'r') as f:
+
+            config = json.load(f)
+
+        return cls.from_config(
+            config=config,
+            sun=sun
+        )