Update save_data function to directly append confidence_score from item

main.py

@@ -358,7 +358,7 @@ async def save_data(
             data["model_type"].append(item.model_type)
             data["reaction"].append(item.reaction)
             data["timestamp"].append(datetime.now(timezone.utc).isoformat().replace('+00:00', 'Z'))
-            data["confidence_score"].append(item.get("confidence_score", 0.0))
+            data["confidence_score"].append(item.confidence_score)
         
         try:
             # Load existing dataset and merge