Update app.py

app.py

@@ -241,7 +241,7 @@ class AdvancedRAG:
                 thread_id=self.thread_id,
                 role="user",
                 content="I have uploaded a document. Please analyze it.",
-                file_ids=[file_obj.id]
+                attachments=[{"file_id": file_obj.id}]
             )
 
             return file_obj.id