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

src/Worker/Directory.php

@@ -11,6 +11,7 @@ use Friendica\Core\Hook;
 use Friendica\Core\Logger;
 use Friendica\Core\Worker;
 use Friendica\Database\DBA;
+use Friendica\DI;
 use Friendica\Util\Network;
 
 class Directory