v0.12.2

Fixed

• check's next-kit migrate-identity now skips users without a numeric osuId (system accounts) entirely: they're never grouped with other users, never inserted into identity, and never get an idMap entry, so references pointing at them are left untouched instead of being rewritten to nowhere. MigrateReport gains usersSkipped; the CLI's summary line reports it alongside usersSeen/usersWritten.

Changed

• auth's old SessionReader type (the better-auth instance shape used by getOsuUser/getSessionUser/requireSession/requireAdmin) is renamed to OsuAuthInstance, so SessionReader can mean one thing: createSessionReader's own instance type (session-reader.ts), which the barrel used to export only as SessionReaderInstance to dodge this exact collision. session.ts keeps a SessionReader alias of OsuAuthInstance for source compatibility, and session-reader.ts keeps a SessionReaderInstance alias of SessionReader (the barrel exports both — bb/packs/pools/haruhime.moe all import SessionReaderInstance, none import the old SessionReader, so this is a non-breaking patch for every real consumer).