unsupportedpastels m4: scripts/check says it runs the lint checks CI runs, but CI
also runs scripts/check-case-collisions.py, scripts/ci/check_lazy_deps_imports.py
and scripts/ci/check_profile_archive_boundary.py in workflows of their own
(case-collision-check.yml, lazy-deps-guard.yml, profile-artifact-check.yml). A
case-colliding pair passed scripts/check and failed CI.
All three are deterministic and local (git ls-files / an os.walk of the checkout;
measured here: 0.2 s, ~7 s, 0.1 s on the full tree), so they run as ordinary guard
jobs - in the snapshot root for --staged/--commit like the other guards - and are
selectable with --only case-collisions / lazy-deps / profile-archives.
f98585d5cc