Label each dual face by its distance, within the source-dual cut, from
the first entry's cap down tooth. Regenerate the seed 1 and seed 2 full
walk figures and metadata with the new labelling.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Source-dual cut is a spanning tree of the dual (38 faces, 37 edges,
connected and acyclic) after 20 cut edges removed.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>