mesh/merge-gate pass: builds build-agent, mesh-controller → ace, g14, novox, shanks; no bus step; every machine composes with the change as it did without …
A long run's logs pushed the --- FAIL lines out of the last 200 lines the
summary was named from, so a failed check could not say which test failed.
Pick the lines that name a failure as the output streams, keep them whole at
the end of the verdict's report, and say the whole output in the build's log.
