增加依赖

offline-backend-20260512/backend/packages/harness/pyproject.toml

@@ -32,7 +32,10 @@ dependencies = [
     "duckdb>=1.4.4",
     "langchain-google-genai>=4.2.1",
     "langgraph-checkpoint-sqlite>=3.0.3",
+    "langgraph-checkpoint-postgres>=3.0.5",
     "langgraph-sdk>=0.1.51",
+    "psycopg[binary]>=3.3.3",
+    "psycopg-pool>=3.3.0",
     "sqlalchemy[asyncio]>=2.0,<3.0",
     "aiosqlite>=0.19",
     "alembic>=1.13",