A red scheduled run blocked nothing and told nobody. install-e2e-red.yml
runs after every scheduled "Install & Update E2E" run: red opens one issue
labelled install-e2e-red (or rewrites the open one's body in place) with the
red legs grouped by failure class and linked; the first green run closes
it. No per-run comment, never a second issue.
It is its own workflow_run workflow because install-e2e.yml is also called
by stable-release.yml with read-only permissions, and a nested job asking
for issues: write would fail that call at startup. workflow_dispatch with a
dry-run default previews the change for any run id.
5afba1e8d9