feat 接入report

src/server/agent/graph.py

@@ -2,6 +2,7 @@ from typing import Literal
 from langchain_core.messages import AIMessage
 from langchain_core.runnables import RunnableConfig
 from langchain_qwq import ChatQwen
+from langgraph.checkpoint.serde.jsonplus import JsonPlusSerializer
 from langgraph.graph import StateGraph, END, START
 from pydantic import BaseModel
 from pymongo import MongoClient
@@ -91,6 +92,7 @@ client = MongoClient(MONGO_URI)
 checkpointer = MongoDBSaver(
     client=client["furniture_agent_db"],
     db_name="langgraph",
-    collection_name="checkpoints"
+    collection_name="checkpoints",
+    serde=JsonPlusSerializer(pickle_fallback=True),  # ← 關鍵這一行
 )
 app = workflow.compile(checkpointer=checkpointer)