include SiteId in SyncEvent

Oqtane.Shared/Models/Sync.cs

@@ -12,6 +12,7 @@ namespace Oqtane.Models
     public class SyncEvent : EventArgs
     {
         public int TenantId { get; set; }
+        public int SiteId { get; set; }
         public string EntityName { get; set; }
         public int EntityId { get; set; }
         public string Action { get; set; }