Feat/137 event caching

[minjun3021]

What is this PR?

• Github Issue: 이벤트 페이지 조회 캐싱 #137

Key Changes

Test Checklist

[junha-ahn]

캐싱 관련 테스트 구현 부탁드려요.

Integration이여도 상관없습니다.

API Controller 조회 후 캐시 스토리지 조회하는 등..

[codecov]

Codecov Report

Attention: 8 lines in your changes are missing coverage. Please review.

Comparison is base (38304fe) 81.69% compared to head (86ff69a) 80.86%.
Report is 1 commits behind head on main.

❗ Current head 86ff69a differs from pull request most recent head f1bd284. Consider uploading reports for the commit f1bd284 to get more accurate results

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #141      +/-   ##
============================================
- Coverage     81.69%   80.86%   -0.84%     
  Complexity      142      142              
============================================
  Files            43       44       +1     
  Lines           754      763       +9     
  Branches         31       31              
============================================
+ Hits            616      617       +1     
- Misses          115      123       +8     
  Partials         23       23              

Files	Coverage Δ
...p4/ticketingservice/TicketingserviceApplication.kt	50.00% <ø> (ø)
...up4/ticketingservice/controller/EventController.kt	100.00% <100.00%> (ø)
.../com/group4/ticketingservice/config/CacheConfig.kt	0.00% <0.00%> (ø)

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