Add campaign manager

Hcs.WebApp/Data/Hcs/Campaign.cs

@@ -0,0 +1,27 @@
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Hcs.WebApp.Data.Hcs
+{
+    public class Campaign
+    {
+        public enum CampaignType
+        {
+            ExportRequiredRegistryElements_15_7_0_1
+        }
+
+        public int Id { get; set; }
+
+        public CampaignType Type { get; set; }
+
+        public string InitiatorId { get; set; }
+
+        public DateTime StartedAt { get; set; }
+
+        public DateTime? EndedAt { get; set; }
+
+        public virtual ICollection<Operation> Operations { get; set; } = [];
+
+        [NotMapped]
+        public bool Completed => EndedAt.HasValue;
+    }
+}