Add support for users who belong to multiple organizations to select
which organization's CA should sign their SSH certificates.
Changes:
- CLI: Add --org-id and --list-orgs options for organization selection
- API: Return MULTIPLE_ORGS_AMBIGUOUS error when org selection needed
- API: Add /users/me/organizations/simple endpoint for CLI org listing
- DB: Add organization_id to certificate_audit_logs for better tracking
- Include organization_name in certificate response for clarity
Adds TOTP (Time-based One-Time Password) two-factor authentication support including:
- New TOTP service with secret generation, QR code provisioning, and code verification
- New auth endpoints for enrollment, verification, status, and backup code management
- New TOTP authentication method type and user methods for TOTP management
- Backup codes generation and verification for account recovery
- Updated OIDC endpoints with timezone-aware datetime handling and RFC-compliant responses
- Added "roles" scope support for OIDC userinfo and ID tokens
- New pyotp dependency for TOTP operations
- Comprehensive unit tests for TOTP service