Runs the whole §9 PPE stage non-interactively after the operator's gcloud
reauth: bot-token-seed the PPE repos -> ensure E2E secret -> deploy ->
wait for health=0.52.0 + bdd-collection sync -> run metadata.spec.js
against the deployed host. Idempotent; secrets fetched from SM, never
echoed. Test/ops infra (not in the deployed artifact).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>