9 backed string enums covering purpose, field type, submission status/mode/review,
field width, value storage hint, snapshot mode, webhook delivery status.
FormPurpose/FormFieldType include helper methods per ARCH §3/§5. All with
declare(strict_types=1) and values() helpers for validation rules.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Three verification methods (TOTP authenticator, email code, backup codes),
trusted device management with 30-day expiry, role-based enforcement for
super_admin and org_admin, admin reset capability, and full test coverage
(46 tests). Modifies login flow to support MFA challenge/response with
temporary session tokens stored in cache.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
