- Add sso_enabled, sso_provider, sso_config (JSONB) columns to Account model
(migration included in branding commit 58e3f27f3e8f)
- Create sso_service.py stub with initiate_sso_login, process_sso_callback,
validate_sso_config — all raise NotImplementedError (Phase 5)
- Add GET /accounts/me/sso endpoint returning enabled status and provider
- Add SSO section in AccountSettingsPage with Enterprise badge and Contact Us link
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
