- Introduced `AccompanyingPeriodWorkEvaluationDocumentSubjectConverter` for converting entities into audit subjects.
- Added `AccompanyingPeriodWorkEvaluationDocumentSubjectDisplayer` for translating and displaying audit subjects.
- Added necessary translation keys for display messages.
- Implemented unit tests for both the converter and displayer to ensure correctness and reliability.
- Updated `AccompanyingPeriodWorkSubjectConverter` to handle related accompanying periods.