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- Native-condition Acknowledge on a non-Primary node returns BadInvalidState (nothing routed/applied/reported) via NativeAlarmAckPrimaryGate, fed from IDriverPrimaryRoleSource by OtOpcUaServerHostedService. - A re-ack carrying a comment reports one comment event (Acked/Confirmed unchanged). - TimedShelve applies its requested duration and the scripted projection carries UnshelveAtUtc, so ShelvingState/UnshelveTime counts down instead of ~24.8 days. - Native re-ack still routed to the driver (deliberate: documented retry path), pinned. - AdminUI /alerts client ack/shelve path test; docs/AlarmTracking.md decisions incl. accepted SDK EventsMonitored residual (item 6). - Also #599/03/S20: RemoveEquipmentSubtree severs inverse Organizes edges. Claude-Session: https://claude.ai/code/session_01Ef2ozxS7QPanGT8uoATbTe