Fix campaign steps

Hcs.WebApp/BackgroundServices/OperationExecutionState.cs

@@ -5,21 +5,32 @@ namespace Hcs.WebApp.BackgroundServices
 {
     public class OperationExecutionState
     {
-        private readonly ConcurrentQueue<Operation> operations = new();
+        private readonly ConcurrentQueue<Operation> operationsInQueue = new();
+        private readonly HashSet<Operation> operationsInProcess = [];
 
         public void EnqueueOperation(Operation operation)
         {
-            operations.Enqueue(operation);
+            operationsInQueue.Enqueue(operation);
         }
 
         public bool TryDequeueOperation(out Operation operation)
         {
-            return operations.TryDequeue(out operation);
+            return operationsInQueue.TryDequeue(out operation);
+        }
+
+        public void SetProcessingOperation(Operation operation)
+        {
+            operationsInProcess.Add(operation);
+        }
+
+        public void UnsetProcessingOperation(Operation operation)
+        {
+            operationsInProcess.Remove(operation);
         }
 
         public bool HasCampaignOperation(int campaignId)
         {
-            return operations.Any(x => x.CampaignId == campaignId);
+            return operationsInProcess.Any(x => x.CampaignId == campaignId);
         }
     }
 }