fix support for non run states

src/Umbraco.Core/Sync/SyncBootState.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Umbraco.Core.Sync
+{
+    public enum SyncBootState
+    {
+        /// <summary>
+        /// Unknown state. Treat as HasSyncState
+        /// </summary>
+        Unknown = 0,
+        /// <summary>
+        /// Cold boot. No Sync state
+        /// </summary>
+        ColdBoot = 1,
+        /// <summary>
+        /// Warm boot. Sync state present
+        /// </summary>
+        HasSyncState = 2
+    }
+}