BackupsHealthIndicator made its own context with a plain tokenless
QSession. Token-based authentication modules (OAuth2, Auth0) reject any
tokenless session other than QSystemUserSession, so the plan query failed
session validation and the check errored on such hosts (kof22). Use core
QSystemUserSession(instance).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>