The hosted 7 GB runner cannot build release/v3.8.51 in any profile: `Build App`
(build.yml, push on every branch, full `build:release`) died in 19 of the last 30
runs — the branch tip included — with "The runner has received a shutdown signal"
~8 min into `next build`, swapfile and all; the advisory quality.yml build failed on
8/8 recent fork PRs with the same recipe; and `DAST smoke (PR)`'s backend-only build
died ~7 min in before the server even started, hidden as a permanently red
continue-on-error check. Together they painted every PR into release/** red with
zero signal and, on build.yml, produced an artefact nothing downloads.
- build.yml: workflow_dispatch only. The bundle is validated where a build fits —
ci.yml `Build` on the self-hosted omni-build pool after every merge to main, and
nightly-release-green.yml on the same pool for release/**.
- dast-smoke.yml: pull_request into main only (plus workflow_dispatch to smoke a
release branch by hand); main's tree still builds on the hosted runner in ~5.5 min.
- quality.yml: the fork-only rationale of `Build (advisory)` updated to say why
own-origin PRs no longer get a hosted build either. Behaviour unchanged.
check:workflows --ratchet: 194 zizmor findings, baseline 194. check-workflows and
backend-only-smoke-workflows suites pass. Trade-off stated in the PR: own-origin PRs
into release/** lose a pre-merge build that was not succeeding anyway; the nightly
rail files a base-red issue within a day if a merge breaks the build.
