feat(admin-curation): 리스트 정합성 개선 및 활성 캐릭터 수 DB 집계 적용

- 비활성(삭제) 큐레이션을 목록에서 제외: findByIsActiveTrueOrderBySortOrderAsc 사용
- 리스트 항목에 characterCount 추가 및 DB GROUP BY + COUNT로 직접 집계
- CharacterCurationMappingRepository: 집계용 프로젝션(CharacterCountPerCuration)과 countActiveCharactersByCurations 쿼리 추가
- CharacterCurationAdminService: listAll에서 집계 결과를 활용해 characterCount 매핑 (대량 엔티티 로딩 제거)
- CharacterCurationRepository: findMaxSortOrder 쿼리로 신규 등록 정렬 순서 계산에 활용
- 컨트롤러: 캐릭터 리스트 응답 DTO(CharacterCurationCharacterItemResponse) 사용, 이미지 URL은 CloudFront host + imagePath로 조립

src/main/kotlin/kr/co/vividnext/sodalive/admin/chat/character/curation/CharacterCurationAdminDto.kt

@@ -29,7 +29,8 @@ data class CharacterCurationListItemResponse(
     val id: Long,
     val title: String,
     val isAdult: Boolean,
-    val isActive: Boolean
+    val isActive: Boolean,
+    val characterCount: Int
 )
 
 // 관리자 큐레이션 상세 - 캐릭터 리스트 항목 응답 DTO

src/main/kotlin/kr/co/vividnext/sodalive/admin/chat/character/curation/CharacterCurationAdminService.kt

@@ -125,8 +125,22 @@ class CharacterCurationAdminService(
 
     @Transactional(readOnly = true)
     fun listAll(): List<CharacterCurationListItemResponse> {
-        return curationRepository.findAllByOrderBySortOrderAsc()
+        val curations = curationRepository.findByIsActiveTrueOrderBySortOrderAsc()
-            .map { CharacterCurationListItemResponse(it.id!!, it.title, it.isAdult, it.isActive) }
+        if (curations.isEmpty()) return emptyList()
+
+        // DB 집계로 활성 캐릭터 수 카운트
+        val counts = mappingRepository.countActiveCharactersByCurations(curations)
+        val countByCurationId: Map<Long, Int> = counts.associate { it.curationId to it.count.toInt() }
+
+        return curations.map { curation ->
+            CharacterCurationListItemResponse(
+                id = curation.id!!,
+                title = curation.title,
+                isAdult = curation.isAdult,
+                isActive = curation.isActive,
+                characterCount = countByCurationId[curation.id!!] ?: 0
+            )
+        }
     }
 
     @Transactional(readOnly = true)

src/main/kotlin/kr/co/vividnext/sodalive/chat/character/curation/repository/CharacterCurationMappingRepository.kt

@@ -30,4 +30,19 @@ interface CharacterCurationMappingRepository : JpaRepository<CharacterCurationMa
     fun findByCurationWithCharacterOrderBySortOrderAsc(
         @Param("curation") curation: CharacterCuration
     ): List<CharacterCurationMapping>
+
+    interface CharacterCountPerCuration {
+        val curationId: Long
+        val count: Long
+    }
+
+    @Query(
+        "select m.curation.id as curationId, count(m.id) as count " +
+            "from CharacterCurationMapping m join m.chatCharacter ch " +
+            "where m.curation in :curations and ch.isActive = true " +
+            "group by m.curation.id"
+    )
+    fun countActiveCharactersByCurations(
+        @Param("curations") curations: List<CharacterCuration>
+    ): List<CharacterCountPerCuration>
 }

src/main/kotlin/kr/co/vividnext/sodalive/chat/character/curation/repository/CharacterCurationRepository.kt

@@ -8,7 +8,6 @@ import org.springframework.stereotype.Repository
 @Repository
 interface CharacterCurationRepository : JpaRepository<CharacterCuration, Long> {
     fun findByIsActiveTrueOrderBySortOrderAsc(): List<CharacterCuration>
-    fun findAllByOrderBySortOrderAsc(): List<CharacterCuration>
 
     @Query("SELECT MAX(c.sortOrder) FROM CharacterCuration c WHERE c.isActive = true")
     fun findMaxSortOrder(): Int?