- README: document work/build_folders.py (hand-sorted folder identities)
and the new age-split workflow for splitting a long-running identity
into era-specific facesets after clustering.
- Force-track work/age_split_001.py and work/check_faceset001_age.py;
these are the worked example + readiness probe for faceset_001 and
the template for splitting any other identity by EXIF era.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
