fix(deploy): blackbox-exporter was gated out of its own deploy path

PR #69 wired the copier, planner entry and health gate but missed the
three dispatch gates: the client valid_service, the remote
service_is_allowed, and deploy_service's case list. The client gate
rejected --service blackbox-exporter outright; even past it the
dispatcher's catch-all hard-fails on dankclaw (no compose since
2026-09-16). New seam pins the class: every dankclaw service the
remote gate allows must carry a deploy_service case - proven red by
planting a gated, undispatched name.

scripts/deploy-remote.sh

@@ -86,7 +86,7 @@ service_is_allowed() {
         dankclaw:open-webui|dankclaw:gitea-postgres|dankclaw:gitea-server|\
         dankclaw:comfyui|dankclaw:hermes|\
         dankclaw:hermes-dashboard|dankclaw:hermes-webui|dankclaw:prometheus|dankclaw:grafana|\
-        dankclaw:loki|dankclaw:alloy|dankclaw:node-exporter|dankclaw:cadvisor|dankclaw:gpu-exporter|dankclaw:alertmanager|\
+        dankclaw:loki|dankclaw:alloy|dankclaw:node-exporter|dankclaw:cadvisor|dankclaw:gpu-exporter|dankclaw:alertmanager|dankclaw:blackbox-exporter|\
         dankclaw:authentik-postgres|dankclaw:authentik-server|\
         dankclaw:authentik-worker|dankclaw:authentik-outpost|dankclaw:authentik-outpost-ldap|dankclaw:anubis|\
         dankclaw:caddy|dankclaw:homepage|dankclaw:seerr|dankclaw:marreta|\
@@ -2086,7 +2086,7 @@ deploy_service() {
         plex) deploy_plex ;;
         tautulli) deploy_tautulli ;;
         alloy) deploy_alloy ;;
-        prometheus|grafana|loki|node-exporter|cadvisor|alertmanager) deploy_observability "$service" ;;
+        prometheus|grafana|loki|node-exporter|cadvisor|alertmanager|blackbox-exporter) deploy_observability "$service" ;;
         gpu-exporter) deploy_gpu_exporter ;;
         comfyui) deploy_comfyui ;;
         *) deploy_compose_service "$service" ;;