The first live run failed with "Could not fetch an OIDC token": the action
needs id-token: write to authenticate the GitHub App.
The reviewer also checked out dev, where the material under review does not
exist yet — specs and code are committed to issue/<NN>-slug. The job now
switches to that branch when it is pushed, and warns loudly when it is not.
Issue: #114
User-Visible: no
Adds .github/workflows/process.yml. A status label change is the trigger:
S4-spec-review runs the spec review, S7-code-review runs the code review,
and the verdict decides the next label. Only a green verdict advances;
yellow and red return the task to its author. Cycle limits (4, or 2 on the
light track) are counted from the verdicts already posted on the issue.
Labels are moved with HP_PROCESS_TOKEN, not GITHUB_TOKEN, so the change
emits an event and the chain continues.
Issue: #114
User-Visible: no
Matysh