fix: register api_platform.serializer.mapping.class_metadata_factory

Author: alanpoulain

src/Core/Bridge/Symfony/Bundle/Resources/config/api.xml

@@ -133,6 +133,10 @@
             <tag name="serializer.normalizer" priority="-895" />
         </service>
 
+        <service id="api_platform.serializer.mapping.class_metadata_factory" class="ApiPlatform\Core\Serializer\Mapping\Factory\ClassMetadataFactory" decorates="serializer.mapping.class_metadata_factory" decoration-priority="-1" public="false">
+            <argument type="service" id="api_platform.serializer.mapping.class_metadata_factory.inner" />
+        </service>
+
         <!-- Resources Operations path resolver -->
 
         <service id="api_platform.operation_path_resolver" alias="api_platform.operation_path_resolver.router" public="false" />