Fix for stackoverflow

tools/Migrate_01/Migrations/BuildFullTextIndices.cs

@@ -30,7 +30,7 @@ namespace Migrate_01.Migrations
 
         public Task UpdateAsync()
         {
-            return UpdateAsync();
+            return UpdateAsync(CancellationToken.None);
         }
 
         public async Task UpdateAsync(CancellationToken ct)

tools/Migrate_01/Rebuilder.cs

@@ -114,7 +114,7 @@ namespace Migrate_01
                     {
                         await worker.SendAsync(id);
                     }
-                }, filter, ct);
+                }, filter, ct: ct);
 
                 worker.Complete();