Review fixes for the comment workflow. Artifacts are downloaded by name
for the exact attempt that finished, and for the baseline run's latest
attempt, since a rerun keeps earlier attempts' artifacts under the same
run. Every lookup prints nothing instead of failing, so no quattro
baseline yet, an expired one, or a missing boot file shows as "–"
rather than ending the script under set -e before any comment. The
install test's own marker step takes ownership of test-runs first,
which the harness created as root inside its container.
A second workflow, triggered when the install test completes, posts one
comment on the pull request and updates it on every run: install, first
boot and everyday boot next to quattro's latest numbers, with the change,
and the install phases in a collapsed table. Pushes to quattro now run
the install test too, so there is always a baseline.
It runs from quattro's copy with write access, which works for pull
requests from forks, so it never checks out or runs pull request code.
It reads only the finished run's artifact, trusts the pull request
number in it only when that pull request's head is the commit the run
tested, and keeps phase names to plain text.
Emir Beganovic