Acknowledgement
DELETE /api/bng/events/{event_id} read_write
DELETE /api/bng/events read_write
Acknowledging a single event adds its identifier to the acknowledgement set,
removes it from the history map, and releases any associated outage tracker. It
is idempotent — re-acknowledging succeeds and does not duplicate the audit
line. Acknowledging an unknown identifier also succeeds; there is no existence
check, so an integration replaying acknowledgements is safe. The response is
{"ok": true, "acked": "<id>"}.
The bulk form clears the console: it wipes the history map wholesale and adds the
currently-live identifiers to the acknowledgement set. The distinction matters —
recovered entries are dropped, while still-active faults remain suppressed until
they resolve and fire again. The response is {"ok": true, "cleared": <n>}.