chore: retire the monitoring-ui control plane

.github/workflows/prod-deploy.yml

@@ -1,8 +1,9 @@
 name: Vercel prod deploy
 
-# Auto-deploy to Vercel Production on every push to main. Triggered by the
-# openbench-monitoring control plane after it merges a promote / rollback PR
-# (or by any direct merge to main). Same VERCEL_TOKEN as the staging workflow.
+# Auto-deploy to Vercel Production on every push to main (any merged PR).
+# Same VERCEL_TOKEN as the staging workflow. The openbench-monitoring
+# control plane that originally drove this was retired 2026-07-10; the
+# workflow itself stays as the sole prod deploy path.
 #
 # Required GitHub secrets (Settings → Secrets and variables → Actions):
 #   VERCEL_TOKEN       — vercel.com/account/tokens, scope = mobula-labs

infrastructure/README.md

@@ -9,7 +9,6 @@ infrastructure/
 │   └── prometheus.yml Scrape config. one job per benchmark
 ├── monitoring/        Full Railway monitoring stack: prometheus + grafana +
 │                      alertmanager + prom-gateway (see monitoring/README.md)
-├── monitoring-ui/     Internal control plane (bench state dashboard, Railway)
 └── prom-admin/        Admin UI for per-bench Prom TSDB wipes (Railway)
 ```