Phase 5 is an infra PR against groombook/infra, which means it is governed
by the devops pipeline. Spelling out a separate (QA-only) review flow here
both duplicates devops and contradicted its QA+CTO requirement. Replaced
the step list with a one-paragraph hand-off.
Resolves the policy ambiguity flagged in the PR description.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>