fix 数据库会话管理

app/chain/site.py

@@ -1,5 +1,7 @@
 from typing import Union, Tuple
 
+from sqlalchemy.orm import Session
+
 from app.chain import ChainBase
 from app.core.config import settings
 from app.db.models.site import Site
@@ -20,9 +22,9 @@ class SiteChain(ChainBase):
     站点管理处理链
     """
 
-    def __init__(self):
-        super().__init__()
-        self.siteoper = SiteOper()
+    def __init__(self, db: Session = None):
+        super().__init__(db)
+        self.siteoper = SiteOper(self._db)
         self.cookiehelper = CookieHelper()
         self.message = MessageHelper()