Rows resolving to the same (bgg_id, version_id — or both version-
unknown) are the same physical game read twice unless their extraction
cues conflict (two editions stay separate). The survivor is the read
whose transcription matches the BGG name; losers are marked
match_status=merged with a new merged_into column — no row is ever
deleted, and older matches.csv files without the column still read.
Downstream: diff skips merged rows but folds their photos into the
survivor's to_add provenance; enrich and the review passes ignore them.
The web UI gains a Merges section ("Jokin Ha... merged into Joking
Hazard") with a veto (v key) that restores the row as a distinct
approved match, plus a merged catalog chip and header tally.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Eric Wagoner
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