fix 优化连接参数

app/chain/dashboard.py

@@ -2,9 +2,10 @@ from typing import Optional, List
 
 from app import schemas
 from app.chain import ChainBase
+from app.utils.singleton import Singleton
 
 
-class DashboardChain(ChainBase):
+class DashboardChain(ChainBase, metaclass=Singleton):
     """
     各类仪表板统计处理链
     """

app/chain/system.py

@@ -8,10 +8,11 @@ from app.core.config import settings
 from app.log import logger
 from app.schemas import Notification, MessageChannel
 from app.utils.http import RequestUtils
+from app.utils.singleton import Singleton
 from app.utils.system import SystemUtils
 
 
-class SystemChain(ChainBase):
+class SystemChain(ChainBase, metaclass=Singleton):
     """
     系统级处理链
     """

app/chain/webhook.py

@@ -4,10 +4,11 @@ from typing import Any
 from app.chain import ChainBase
 from app.schemas import Notification
 from app.schemas.types import EventType, MediaImageType, MediaType, NotificationType
+from app.utils.singleton import Singleton
 from app.utils.web import WebUtils
 
 
-class WebhookChain(ChainBase):
+class WebhookChain(ChainBase, metaclass=Singleton):
     """
     Webhook处理链
     """