SyncRule: adjust to fit latest schema changes

library/Director/Objects/SyncRule.php

@@ -20,6 +20,9 @@ class SyncRule extends DbObject
         'update_policy'      => null,
         'purge_existing'     => null,
         'filter_expression'  => null,
+        'sync_state'         => 'unknown',
+        'last_error_message' => null,
+        'last_attempt'       => null,
     );
 
     private $filter;