Mirrors check-divisions.yml. Runs scripts/check-tools.sh on every PR and on
push to main (no path filter) so any change to ALL_TOOLS in install.sh, the
converter set in convert.sh, or tools.json that breaks consistency fails the
build — same CI protection divisions.json already has.
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>