Add result wait service

Hcs.WebApp/BackgroundServices/ResultWaitState.cs

@@ -0,0 +1,25 @@
+using Hcs.WebApp.Data.Hcs;
+using System.Collections.Concurrent;
+
+namespace Hcs.WebApp.BackgroundServices
+{
+    public class ResultWaitState
+    {
+        private readonly ConcurrentQueue<Operation> operations = new();
+
+        public void EnqueueOperation(Operation operation)
+        {
+            operations.Enqueue(operation);
+        }
+
+        public bool TryDequeueOperation(out Operation operation)
+        {
+            return operations.TryDequeue(out operation);
+        }
+
+        public bool HasCampaignOperation(int campaignId)
+        {
+            return operations.Any(x => x.CampaignId == campaignId);
+        }
+    }
+}