[Feature] 동시성 이슈 해결을 위한 DB Unique 조건 적용 #156
Merged
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💡 연관된 이슈
close #155
📝 작업 내용
정리 내용: https://koeyhk.tistory.com/121
💬 리뷰 요구 사항
동시성 이슈 해결을 위한 방식을 고민하다가,
DB Unique 조건으로 구현하고 테스트 해봤는데 확인 부탁드립니다!