[fix] 문항 통계 업데이트 전 flush

Author: sejoon00

src/main/java/com/moplus/moplus_server/domain/problem/domain/problem/ProblemAdminIdService.java

@@ -16,7 +16,7 @@ public class ProblemAdminIdService {
     /*
         문제 ID 생성 로직
         C : 문제 타입 ( 1: 기출문제, 2: 변형문제, 3: 창작문제 )
-        S : ( 1: 고1, 2: 고2, 3: 미적분, 4: 기하, 5: 확률과 통계, 6: 가형, 7: 나형 )
+        S : ( 1: 고1, 2: 고2, 3: 미적분, 4: 기하, 5: 확률과 통계, 6: 고3_공통 )
         YY: 년도 (두 자리)
         MM: 월 (두 자리)
         NN : 번호 (01~99)

src/main/java/com/moplus/moplus_server/statistic/Problem/service/CountStatisticsUpdateService.java

@@ -29,9 +29,9 @@ public void updateStatistics(Long statisticId, StatisticFieldType type, Statisti
     @Transactional
     public void createStatistics(Long statisticId, StatisticEntityTarget target) {
         switch (target) {
-            case PROBLEM -> problemStatisticRepository.save(new ProblemStatistic(statisticId));
-            case PROBLEM_SET -> problemSetStatisticRepository.save(new ProblemSetStatistic(statisticId));
-            case CHILD_PROBLEM -> childProblemStatisticRepository.save(new ChildProblemStatistic(statisticId));
+            case PROBLEM -> problemStatisticRepository.saveAndFlush(new ProblemStatistic(statisticId));
+            case PROBLEM_SET -> problemSetStatisticRepository.saveAndFlush(new ProblemSetStatistic(statisticId));
+            case CHILD_PROBLEM -> childProblemStatisticRepository.saveAndFlush(new ChildProblemStatistic(statisticId));
         }
     }