- ApiResource MailSettings expose les operations Get + Patch sur /api/mail/configuration
- Provider + Processor relient le DTO a l'entite MailConfiguration (singleton)
- password en write-only (jamais retourne) + hasPassword en lecture
- chiffrement password via TokenEncryptor (sodium)
- securite ROLE_ADMIN sur les deux operations
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>