Stage B step 1. The shop list decides which of a SYB account's shops get
imported.
Matching is by name, so the normalized form is the real key: whitespace
trimmed, full-width ASCII folded, letters lowercased. " ABC店 ", "ＡＢＣ店"
and "abc店" are one shop. DisplayName is only ever shown to people, and
the unique index sits on the normalized column so a caller that skips
normalization cannot create rows that look identical on screen.
Interior whitespace is deliberately not collapsed: two shops differing
only there are still two shops, and merging them silently would be worse
than the duplicate this prevents.
Soft delete uses the DeletedFlag sentinel rather than a nullable
deleted_at in the unique index, which is silently inert because unique
indexes treat every NULL as distinct. Mutation-tested: dropping the
sentinel from the index makes the recreate-after-delete case fail.
The version-local migration file is included this time — the model alone
would never reach an existing database.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
