Clarify photograph coverage across archive and display views
The main dataset card still describes the older 40-photograph display projection as current gallery coverage and calls the independently updated photograph dataset the same table.
This README-only correction distinguishes the pinned main download (40 photographs, 391 nulls), the verified GitHub display snapshot (78 photographs, 624 recording pairings), and the separately confirmed 431-front-photograph dataset. It retains historical counts with their snapshot context and documents the 321 paired-view rows involving 38 photographs whose source labels still predate the October 19 exact-source confirmation. No confirmation is propagated to another evidence layer.
Validation: immutable base 1771ccbd965bfad992e8e543f465401fdd8667fe; exact CSV SHA-256 join confirms the 321-row/38-photograph label difference; source manifests confirm the 40- and 431-photograph projections. Dataset-card YAML and the generated workflow section are unchanged; whitespace checks pass. The patch changes only README.md. No registry, media, derived table, Viewer setting or permission changes are included.
Draft for review; this does not resolve the hosted Viewer incident or regenerate the older projections.