refactor: 봉사 모집글 목록 조회 캐시를 개선한다. #123

All 657 tests pass in 23s

284 files - 3 284 suites - 3 23s ⏱️ -4s
657 tests - 1 657 ✅ - 1 0 💤 ±0 0 ❌ ±0
666 runs - 1 666 ✅ - 1 0 💤 ±0 0 ❌ ±0

Results for commit 9083f54. ± Comparison against earlier commit 2174a81.