Update src/main.py

src/main.py

@@ -17,7 +17,7 @@ DB_URI = os.getenv("DATABASE_URI")
 async def lifespan(app: FastAPI):
     async with AsyncPostgresSaver.from_conn_string(DB_URI) as checkpointer:
         await checkpointer.setup() 
-        app.state.agent = build_agent(checkpointer)
+        app.state.agent = build_agent(None)
         yield
     
 app = FastAPI(