- Add EdaCommunicationMethod enum (EMAIL, MESSENGER)
- Add EdaSettings entity with DB-persisted communication method
- Add AdminEdaSettingsController (GET/PUT /api/admin/eda-settings)
- Add EdaCommunicationRouter that resolves the correct EdaConsentService
- Add MessengerEdaConsentService as placeholder (throws UnsupportedOperationException)
- Add AdminEdaSettingsComponent in frontend with radio button selection
- Route /dashboard/admin-eda-settings (ADMIN only)
- Update EdaCommunicationEventListener to use router
- Remove @Profile from EmailEdaConsentService/SimulatedEdaConsentService
- Use @Lazy for EdaMailSender dependency to support non-prod contexts
- Fix pre-existing deleteUserTariff API call mismatch
