setup ContactRequest processor configuration

src/ApiResource/ContactRequest.php

@@ -5,6 +5,7 @@ namespace App\ApiResource;
 
 use ApiPlatform\Metadata\ApiResource;
 use ApiPlatform\Metadata\Post;
+use App\State\Processor\ContactRequestProcessor;
 use Symfony\Component\Validator\Constraints as Assert;
 
 #[ApiResource(
@@ -12,7 +13,8 @@ use Symfony\Component\Validator\Constraints as Assert;
         new Post(
             uriTemplate: '/contact',
         ),
-    ]
+    ],
+    processor: ContactRequestProcessor::class
 )]
 class ContactRequest
 {