Fix: Handle list type in context_priority_used extraction

app.py

@@ -242,9 +242,17 @@ def generate_response(user_message: str, history: List[Dict], context: Dict) ->
         )
         
         routing_mode = trace.get("routing_mode", "UNKNOWN")
-        context_used = list(trace.get("context_priority_used", {}).get("priority_1", {}).keys())
         
-        logger.info(f"[Hybrid] Mode: {routing_mode}, Diagnosis: {trace.get('stages', {}).get('confirmation', {}).get('final', 'N/A')[:50]}")
+        # Extract context_used safely (can be list or dict)
+        priority_1 = trace.get("context_priority_used", {}).get("priority_1", [])
+        if isinstance(priority_1, dict):
+            context_used = list(priority_1.keys())
+        elif isinstance(priority_1, list):
+            context_used = priority_1
+        else:
+            context_used = []
+        
+        logger.info(f"[Hybrid] Mode: {routing_mode}, Diagnosis: {str(trace.get('stages', {}).get('confirmation', {}).get('final', 'N/A'))[:50]}")
         
         return response_text, context_used, routing_mode