Mirrors the auto-backup infrastructure. A daily periodic WorkManager job plus an
immediate run on enable/"Sync now" and a debounced foreground run keep the mirror
fresh without a ContentObserver.
- SpecialDatesScheduler.apply/runNow + SpecialDatesSyncWorker (EntryPoint):
respects the toggle, debounces foreground runs (4h), and parks the feature in a
PermissionRevoked stalled state (recorded for the settings banner) instead of
retrying forever when READ_CONTACTS is gone.
- CalendulaApp.onCreate reconciles the schedule on every launch.
- RootScreen ON_RESUME enqueues a debounced foreground sync, gated on the
READ_CONTACTS grant so opted-out users never enqueue it.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Jean-Luc Makiola
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