Adding contact details for loaded mails and fixing background notification actions.

Wino.Core.Domain/Interfaces/IBackgroundTaskService.cs

@@ -1,10 +1,18 @@
-namespace Wino.Core.Domain.Interfaces
+using System.Threading.Tasks;
+
+namespace Wino.Core.Domain.Interfaces
 {
     public interface IBackgroundTaskService
     {
         /// <summary>
-        /// Unregisters all existing background tasks. Useful for migrations.
+        /// Unregisters all background tasks once.
+        /// This is used to clean up the background tasks when the app is updated.
         /// </summary>
         void UnregisterAllBackgroundTask();
+
+        /// <summary>
+        /// Registers required background tasks.
+        /// </summary>
+        Task RegisterBackgroundTasksAsync();
     }
 }