adding ai summary - default is disabled

app/config/settings.yaml

@@ -5,7 +5,7 @@ app:
 
 weather:
   location: "viola,tn"
-  hours_ahead: 24
+  hours_ahead: 4           # Matches 4-hour run frequency
   unit_group: "us"
 
 alerts:
@@ -34,3 +34,18 @@ notifications:
 state:
   file_path: "./data/state.json"
   dedup_window_hours: 24
+
+ai:
+  enabled: true
+  model: "meta/meta-llama-3-8b-instruct"
+  api_timeout: 60
+  max_tokens: 500
+
+# These metrics are used for change detection from previous forecast
+change_detection:
+  enabled: true
+  thresholds:
+    temperature: 5.0          # degrees F
+    wind_speed: 10.0          # mph
+    wind_gust: 10.0           # mph
+    precipitation_prob: 20.0  # percentage points