[PM-20041] Deleting Notifications when Task is completed (#5896)

* mark all notifications associated with a security task as deleted when the task is completed

* fix spelling

* formatting

* refactor "Active" to "NonDeleted"

* refactor "Active" to "NonDeleted" for stored procedure

* only send notifications per user for each notification

* move notification status updates into the DB layer to save on multiple queries and insertions from the C#

* Only return UserIds from db layer

* omit userId from `MarkTaskAsCompletedCommand` query.

The userId from the notification will be used

* update UserIds

* consistency in comments regarding `taskId` and `UserId`

src/Infrastructure.Dapper/NotificationCenter/Repositories/NotificationRepository.cs

@@ -56,4 +56,21 @@ public class NotificationRepository : Repository<Notification, Guid>, INotificat
             ContinuationToken = data.Count < pageOptions.PageSize ? null : (pageNumber + 1).ToString()
         };
     }
+
+    public async Task<IEnumerable<Guid>> MarkNotificationsAsDeletedByTask(Guid taskId)
+    {
+        await using var connection = new SqlConnection(ConnectionString);
+
+        var results = await connection.QueryAsync<Guid>(
+            "[dbo].[Notification_MarkAsDeletedByTask]",
+            new
+            {
+                TaskId = taskId,
+            },
+            commandType: CommandType.StoredProcedure);
+
+        var data = results.ToList();
+
+        return data;
+    }
 }