Confirmed (pasted full CI log around a timeout, searched for the
print()'d marker string, found nothing) that plain print() from inside
a UI test never reaches fastlane's xcodebuild log output on this
runner - its formatter only relays lines matching its own known
patterns and drops everything else.
CartCheckoutFlowTests now writes app.debugDescription to
NSTemporaryDirectory()+'pedifoods_uitest_diag.log' on each of its three
failure points (shared dumpDiagnostics helper, appending), clearing any
stale copy in class setUp(). test.yml gained a step after 'Run tests
with coverage' (if: always()) that cats that file when present - TMPDIR
is stable for the whole CI job, unlike the per-run-hashed workspace
path that broke the original screenshot attempt.
See decisions/2026-09-11-ui-test-shared-login-session.md follow-up.