- Add ExternalJobSourceAliasRequest class for managing source alias requests.
- Create ExternalUploadClient to interact with external Excel upload system.
- Introduce ExternalUploadFileMetadata to represent metadata of uploaded files.
- Define IExternalJobImportService interface for external job import operations.
- Update JobDataTrendServiceImpl to support dynamic source code filtering.
- Modify PublicJobFairMapper.xml to ensure proper query handling.
- Add unit tests for ExternalJobExcelParser and ExternalJobFingerprint.
- Create script for applying external job import migrations.
- Implement SQL migration for external job import, including new tables and columns.
