Phase 2 audit
- PHP syntax lint: passed for all PHP files.
- Credential encryption/decryption round-trip: passed.
- Secure token/local-part generation test: passed.
- Runtime database access uses PDO prepared statements.
- No domain, catch-all mailbox, database credential, encryption key, or admin key is hardcoded.
- Migrations were not executed against the production/cPanel database because database credentials were not provided.
