[refactor] 챗봇 히스토리 조회 문제 해결을 위한 DB 저장 구조 변경 #256#262

GerHerMo merged 5 commits intodevprgrms-web-devcourse-final-project/WEB6_8_HaeDokCoding_BE:devfrom

refactor#256prgrms-web-devcourse-final-project/WEB6_8_HaeDokCoding_BE:refactor#256Copy head branch name to clipboard