Added regenerate-references command test

Also updated model resolvers to only fetch model ID, to prevent bringing
back way more data from database than desired.

app/References/ModelResolvers/PagePermalinkModelResolver.php

@@ -18,7 +18,7 @@ class PagePermalinkModelResolver implements CrossLinkModelResolver
 
         $id = intval($matches[1]);
         /** @var ?Page $model */
-        $model = Page::query()->find($id);
+        $model = Page::query()->find($id, ['id']);
 
         return $model;
     }