One site's active alarms, oldest first, as the queue serves them

The site story (site-queue plan, Phase 2): every queued alarm at this site in motion order, each row in exactly the shape of GET /operator/events/all (event, camera, site, parent, interpretation, thread, claim, first_viewed, presigned clip URL). Tenant-scoped through the site: 404 unknown or retired, 403 outside the caller's scope. X-Total-Count carries the site's full active count; the body is capped and keeps the OLDEST rows.