[volume-5] 상품 조회 성능 최적화 — 인덱스, 좋아요 비정규화, Redis 캐싱#207

leeedohyun wants to merge 11 commits intoLoopers-dev-lab:leeedohyunLoopers-dev-lab/loop-pack-be-l2-vol3-java:leeedohyunfrom

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