3232d2f7fd
- V6 migration: consents table with audit columns - Consent entity, repository, service (grant/revoke/check) - ConsentController: GET/POST/DELETE consent endpoints - DSGVO export (Art. 15): full personal data JSON download - DSGVO deletion (Art. 17): anonymization + account deactivation - Frontend: consent banner (modal, cannot dismiss), privacy settings page - React Query hooks for consent + DSGVO operations - Full i18n (de/en) for consent and DSGVO namespaces