[db] 구 배지 획득 기록(orphan user_badges) 정리 V42#267
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V39 배지 재정의 이후 새 badge_id로 갈아끼우면서 보존된 구 스트릭 시절 획득 기록(orphan)을 삭제. 현재 badges에 없는 badge_id의 user_badges 제거. 배포 시점부터 신규 배지는 다음 트리거 이벤트부터 평가/부여(소급 없음). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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배경
V39 배지 재정의에서
DELETE FROM badges후 새 UUID로 10종을 재시드하면서user_badges(획득 기록)는 보존했습니다. 그 결과 구 스트릭 시절 획득분이 현재 배지에 없는 badge_id를 가리키는 orphan으로 DB에 남아 있습니다(코드는 mapNotNull로 숨김).변경
V42__cleanup_orphan_user_badges.sql:badge_id NOT IN (SELECT id FROM badges)인 user_badges 삭제영향 / 정책
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