feat: search mode in client: fast

Author: CaralHsi

evaluation/scripts/utils/client.py

@@ -181,7 +181,7 @@ def search(self, query, user_id, top_k):
                 "mem_cube_id": user_id,
                 "conversation_id": "",
                 "top_k": top_k,
-                "mode": "mixture",
+                "mode": "fast",
                 "handle_pref_mem": False,
             },
             ensure_ascii=False,