Expone GET /api/v1/filtros?tipo=AREA|SUBAREA|CARGO|LOCAL sobre las foreign
tables area, subarea, cargo y locales, devolviendo {id, text} por item.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GDaQQ4oDPiTnXr2FfDLnst