The adminrpc binary runs HTTP endpoints on port grpc_port+1 (9091),
but k8s deployment only exposed port 9090 (gRPC). The /api/admin/*
HTTP routes were unreachable from the admin dashboard frontend.
- Add http container port 9091 to Deployment
- Add http named port to k8s Service
- Point liveness/readiness probes to HTTP port 9091
- Add http_port: 9091 to Helm values.yaml