Resolve lead-in points by walking backward through cutting order (from
perimeter outward) so each lead-in faces the next cutout to be cut
rather than pointing back at the previous lead-out. Extract EmitContour
and EmitScribeContours to eliminate duplicated cutout/perimeter logic.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>