Update campaign handling

Hcs.WebApp/BackgroundServices/CampaignManagers/IManager.cs

@@ -2,6 +2,16 @@
 {
     public interface IManager
     {
+        public enum ManagerState
+        {
+            Created,
+            Started,
+            Working,
+            Ended
+        }
+
+        public ManagerState State { get; }
+
         Task StartAsync(CancellationToken cancellationToken);
     }
 }

Hcs.WebApp/BackgroundServices/CampaignManagers/ManagerBase.cs

@@ -8,6 +8,8 @@ namespace Hcs.WebApp.BackgroundServices.CampaignManagers
         protected readonly IServiceScopeFactory scopeFactory = scopeFactory;
         protected readonly Campaign campaign = campaign;
 
+        public IManager.ManagerState State { get; } = IManager.ManagerState.Created;
+
         public abstract Task StartAsync(CancellationToken cancellationToken);
     }
 }