RAILIANCE-WP-0016: promote active; inventory and activity-core cutover prep

Mark workplan active with T01/T02 done, document topology, extend status
for activity-core mode, and wire Make targets to the platform multi-host
backup CLI. T03 remains operator-blocked on ESO token.

manifests/cnpg-option-a-backup.yaml

@@ -29,13 +29,16 @@ metadata:
     railiance.apps/backup-lane: option-a
 data:
   mode: workstation-cron
+  next_mode: activity-core
   schedule: "30 2 * * *"
   command: "cd $HOME/railiance-apps && make cnpg-logical-backup"
+  activity_core_definition: daily-cnpg-option-a-backup
+  platform_cli: /opt/railiance-platform/tools/cmd/cnpg-option-a-backup
   clusters: "apps-pg,gitea-db,net-kingdom-pg,state-hub-db"
   rpo_hours: "24"
   rto_hours: "4"
   retention: "14 daily + 4 weekly (Nextcloud operator prune)"
-  note: "In-cluster CronJobs suspended until image with age is available without egress installs"
+  note: "WP-0016: activity-core path primary when enabled; workstation-cron is stopgap. In-cluster CronJobs remain suspended."
 ---
 apiVersion: v1
 kind: ServiceAccount