Found by CI itself, on run 1437 -- the first run that ever got far enough
to try. Everything ahead of it worked: checkout brought both submodules,
v2 pulled and passed its own version assert, and the fixtures resolved at
the pinned version. Then:
scripts/artifacts/pull_artifacts.sh: line 54: unzip: command not found
The replay fixtures ship as a zip in the generic package registry and
pull_artifacts.sh unpacks them with unzip. Without it the step exits 127
and the T2 tier has no input -- reported as a missing fixture by the
verify step below, which is a missing tool wearing the wrong label.
Worth naming why the local rehearsal missed this and CI did not: the
rehearsal had the dumps staged in the working tree by hand, so it built
and ran the tier without ever executing the script that fetches them. The
image was checked against the build, not against the job.
Tag v2 -> v3, in all three places, in one commit.
TRACES: DP-007 | PR-004