fix: 重命名通知渠道模型避免与 alert 模块冲突

- NotificationChannel -> TaskNotifyChannel
- platform_notification_channels -> platform_task_notify_channels

backend/app/services/scheduler.py

@@ -10,7 +10,7 @@ from sqlalchemy.orm import Session
 
 from ..database import SessionLocal
 from ..models.scheduled_task import ScheduledTask, TaskLog
-from ..models.notification_channel import NotificationChannel
+from ..models.notification_channel import TaskNotifyChannel
 from .script_executor import ScriptExecutor
 
 
@@ -260,9 +260,9 @@ class SchedulerService:
         # 发送到通知渠道
         for channel_id in channel_ids:
             try:
-                channel = db.query(NotificationChannel).filter(
-                    NotificationChannel.id == channel_id,
-                    NotificationChannel.is_enabled == True
+                channel = db.query(TaskNotifyChannel).filter(
+                    TaskNotifyChannel.id == channel_id,
+                    TaskNotifyChannel.is_enabled == True
                 ).first()
                 
                 if not channel:
@@ -280,7 +280,7 @@ class SchedulerService:
             except Exception as e:
                 print(f"发送企微应用消息失败: {e}")
     
-    async def _send_to_channel(self, channel: NotificationChannel, content: str, title: str):
+    async def _send_to_channel(self, channel: TaskNotifyChannel, content: str, title: str):
         """发送消息到通知渠道"""
         if channel.channel_type == 'dingtalk_bot':
             payload = {