Group Secret Rotation Background Job
## Feature Automated rotation reminders for group secrets ## Scope - Background worker for group secret rotation reminders - Scan for secrets needing rotation reminders - Send notifications to group owners/maintainers - Update `last_reminder_at` and `next_reminder_at` timestamps - Metrics and logging ## Deliverable Automated rotation reminders for group secrets ## Dependencies https://gitlab.com/gitlab-org/gitlab/-/issues/577344 ## Reference Similar to project secret rotation worker Related to https://gitlab.com/groups/gitlab-org/-/epics/17904
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