feat(ACTIVITY-WP-0012): complete live admin-sync no-restart smoke

Ran Railiance01 cluster validation for POST /admin/sync without restarting
actcore-worker, added a repeatable smoke script, and closed the workplan.

docs/runbook.md

@@ -149,6 +149,24 @@ The v1 posture is manual/operator-triggered sync. A periodic background loop is
 deferred until live use shows it is needed; this keeps customer definition
 changes explicit and avoids background repo scanning from the worker.
 
+### Railiance01 no-restart smoke
+
+After changing a projected definition in `k8s/railiance/20-runtime.yaml`,
+apply the ConfigMap and wait for the API pod volume to refresh (up to ~60s),
+then reconcile without restarting `actcore-worker`:
+
+```bash
+export KUBECONFIG=~/.kube/config-hosteurope
+kubectl apply -f k8s/railiance/20-runtime.yaml
+sleep 60
+kubectl -n activity-core exec deploy/actcore-api -- \
+  python3 -c 'import urllib.request; req=urllib.request.Request("http://localhost:8010/admin/sync?definitions=true&schedules=true", method="POST"); print(urllib.request.urlopen(req).read().decode())'
+```
+
+Automated regression for the disabled `ops-service-inventory-probes`
+projection (enable/cadence flip, idempotent repeat sync, rollback) lives in
+`scripts/smoke_admin_sync_no_restart.py`.
+
 If the API is unavailable, the schedule-only CLI remains available:
 
 ```bash