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fix: 릴리즈 리뷰 반영 — 시드 스냅샷 삭제 범위·검색어 길이 코드 포인트 기준 #257
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When the seed is rerun after the clock advances by more than one hour, snapshots created by the previous run fall outside these two timestamps and are never removed.
resetSeedScoperemoves the corresponding seeded search events, while the snapshot table has unlimited retention, so repeated seed runs accumulate orphaned synthetic ranking history and the seed is no longer idempotent across hour boundaries; track and delete prior seed-owned snapshots rather than limiting cleanup solely to the new run's timestamps.Useful? React with 👍 / 👎.
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미반영(트레이드오프): 스냅샷 소유권 추적은 컬럼 신설이 필요한 dev 시드 과설계. 크론이 시드 이벤트를 집계해 만든 스냅샷도 동일하게 잔존하므로 완전한 멱등은 어차피 불가. popularSearchKeywords는 최신 스냅샷만 노출하므로 과거 정각의 잔존 스냅샷은 화면에 나타나지 않고, 두 정각 한정 삭제로 같은 시간대 재시드의 중복(uk 충돌)은 방지됨.