- Add user_department_infos to telemetry schema, ES mappings, and mid-table sync
- Update UserDao/UserRepositoryImpl to load department info for telemetry
- Add DepartmentDao.get_by_ids and UserDepartmentDao.get_by_user_ids sync methods
- Update 4 Celery sync tasks to include department info
- Add department dimension i18n labels (zh/en/ja)
- Add v2.5 upgrade migration plan for dashboard department dimension
- Include misc docs (architecture, PRD, deployment diagrams) and frontend updates
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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