fix import in UploadRequest resource

src/ApiResources/Core/File/UploadRequest.php

@@ -12,7 +12,7 @@ use App\Enum\Core\FileTypeEnum;
 use App\State\Processor\Core\UploadRequestProcessor;
 use App\State\Provider\Core\DownloadRequestProvider;
 use Ramsey\Uuid\Uuid;
-
+use Symfony\Component\Validator\Constraints as Assert;
 
 /**
  * A request to upload the given content to a File