Implement houses export manager

Hcs.WebApp/Services/HeadquartersService.cs

@@ -36,6 +36,16 @@ namespace Hcs.WebApp.Services
             return result.Where(x => x.Kind == Operation.OperationKind.Remote);
         }
 
+        public async Task<IEnumerable<Operation>> GetNotExecutedRemoteOperationsAsync(int campaignId)
+        {
+            using var context = GetNewContext();
+            var query = from operation in context.Operations
+                        where string.IsNullOrEmpty(operation.MessageGuid) && !operation.EndedAt.HasValue && operation.CampaignId == campaignId
+                        select operation;
+            var result = await query.ToListAsync();
+            return result.Where(x => x.Kind == Operation.OperationKind.Remote);
+        }
+
         public async Task<IEnumerable<Operation>> GetResultWaitingRemoteOperationsAsync()
         {
             using var context = GetNewContext();