The heph CLI requests scope "openid offline_access", but the Authentik
heph OAuth2 provider only mapped openid/email/profile. Without the
offline_access mapping the issued refresh token is bound to the login
session rather than the 30-day refresh-token window; once the session
lapses, hephd's refresh_token grant returns 400 Bad Request and spoke
sync silently degrades (heph sync --status -> auth_failure: true).
Add the built-in offline_access scope mapping to the provider's
property_mappings and document the requirement in the service reference.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
