Longhorn RWO attach latency and per-node engine availability made the
PVC fixture unreliable for a fast repeatable demo. The fixture is now a
ConfigMap; the repair Job runs bitnami/kubectl under the least-privilege
hermes-demo-repair SA and patches state=healthy.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Non-worker nodes (titan-2x lane) are not Longhorn-ready; volume attach
fails there. Same constraint as the demo test-runner.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>