- New auth.gdpr.me_router prefix /api/users/me with:
- GET/POST /gdpr-export → Art.20 JSON download with Content-Disposition
- POST /gdpr-erase → Art.17 erasure request
- GET /gdpr-consent → consent history for caller
- jsonable_encoder fixes datetime serialisation in JSONResponse
- admin_users.html: 'Izvezi moje podatke' now POSTs to alias and uses
filename from Content-Disposition header
- 401 enforced on no-auth, 200 on valid Bearer (verified live)