Add missing Friendica\DI namespace to files (PHPStorm inspection)

src/Model/GServer.php

@@ -12,6 +12,7 @@ use Friendica\Core\Config;
 use Friendica\Core\Protocol;
 use Friendica\Core\Worker;
 use Friendica\Database\DBA;
+use Friendica\DI;
 use Friendica\Module\Register;
 use Friendica\Network\CurlResult;
 use Friendica\Util\Network;