fix(chat): ChatCharacter 엔티티의 isActive 속성 참조 오류 수정

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

@@ -10,5 +10,5 @@ import org.springframework.stereotype.Repository
 interface ChatCharacterRepository : JpaRepository<ChatCharacter, Long> {
     fun findByCharacterUUID(characterUUID: String): ChatCharacter?
     fun findByName(name: String): ChatCharacter?
-    fun findByIsActiveTrue(pageable: Pageable): Page<ChatCharacter>
+    fun findByActiveTrue(pageable: Pageable): Page<ChatCharacter>
 }