fix: add @asynccontextmanager to patched get_sor_context

app/pccs.py

@@ -3,6 +3,7 @@ pccs — 算力中心集群系统 (Pooled Computing Cluster System)
 入口: webapp(init) 模式
 """
 import os, sys
+from contextlib import asynccontextmanager
 
 # ═══ 最早导入并 patch sqlor, 确保所有后续 import 拿到 patched 版本 ═══
 import sqlor.dbpools as _dbp
@@ -16,6 +17,7 @@ _global_db = _dbp.DBPools(_config.databases)
 _orig_sor_ctx = _dbp.get_sor_context
 
 
+@asynccontextmanager
 async def _patched_sor_ctx(env, modulename, errorback=None):
     dbname = env.get_module_dbname(modulename)
     async with _global_db.sqlorContext(dbname) as sor: