定时服务启动方式调整，并调整相关业务代码

apihost/Tnb.API.Entry/Startup.cs

@@ -64,8 +64,10 @@ public class Startup : AppStartup
         services.AddOverideVisualDev();
         //注册任务消息通知 added by ly on 20230814
         services.AddTaskMessageNotify();
+
+        services.AddSingleton<BackgroundService, TimedTaskBackgroundService>();
         //定时任务
-        services.AddHostedService<TimedTaskBackgroundService>();
+        //services.AddHostedService<TimedTaskBackgroundService>();
 
     }