CSO was optional at probe time but fatal at build time: scripts/build.sh
ran build-cso.sh under set -e before the browse server bundle and the
completion stamp, and setup exited when the CSO artifact set was
incomplete. A failed CSO step now prints 'CSO unavailable: the <stage>
step failed' with its log (bin/.gstack-cso-build.log) and retry, and the
build and setup finish. GSTACK_STRICT_BUILD=1 keeps it fatal; the free-tests,
make-pdf-gate and windows-setup-e2e builds set it, so regressions still
fail CI.
setup's summary reads the build-result record instead of the pre-build
availability flag: probe failures keep their prerequisite instruction;
build and publish failures name the stage, the diagnostic and
'bun run build:cso && ./setup', and a restored earlier helper is
reported as 'previous CSO kept: <revision>'. setup records probe
failures in the same file.
The Windows prerequisite probe prefers pwsh, and a probe that fails for
any reason other than a missing toolchain or a compile error keeps its
exit status and first output line (windows-toolchain-probe) instead of
being labeled windows-msvc-toolchain. Reported and diagnosed by
@dviolante.
Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>
