Add support for SubjectConverterManager awareness in converters and refactor subject retrieval.

- Introduced `SubjectConverterManagerAwareTrait` and `SubjectConverterManagerAwareInterface` for injecting subject converter manager into converters.
- Added `getSubjectsForEntity` method in `SubjectConverterManager` to centralize subject retrieval logic.
- Updated converters to set the subject converter manager when applicable.

src/Bundle/ChillMainBundle/Audit/SubjectConverterManagerInterface.php

@@ -17,4 +17,9 @@ interface SubjectConverterManagerInterface
      * @return list<array>
      */
     public function convertEntityToSubjects(mixed $subject): array;
+
+    /**
+     * @return Subject|list<Subject>
+     */
+    public function getSubjectsForEntity(mixed $subject): Subject|array;
 }