[BE] refactor: Flyway 스크립트 V1으로 마이그레이션 및 엔티티 컬럼 반영 (#852) #733

All 644 tests pass in 29s

187 files ±0 187 suites ±0 29s ⏱️ -2s
644 tests ±0 644 ✅ ±0 0 💤 ±0 0 ❌ ±0
657 runs ±0 657 ✅ ±0 0 💤 ±0 0 ❌ ±0

Results for commit 8569800. ± Comparison against earlier commit fc44578.