- Introduced `CommentSubjectConverter` and `CommentSubjectDisplayer` for audit conversion and display logic.
- Integrated `TriggerAuditInterface` into `AccompanyingCourseCommentController` and added audit triggers for create, view, update, delete, pin, unpin, and list actions with translatable descriptions.
- Added unit test `CommentSubjectConverterTest` to ensure proper behavior of the subject converter.
- Enhanced French translations (`messages.fr.yml`) with audit-related labels for comment actions.
