sample_families.json was built at a smaller per-folder cap → only 831 per-index
entries (825 of the 1485 plotted samples labelled). Re-ran the resolver at
--max-files 12 (same clap:fine method) over 150 folders → 1501 per-index entries,
1490 labelled. unwrapped.json now 100% family-coloured (was ~56%): no more grey
'unlabelled' dots, the density field reads everywhere.