feat(creator-cheers): 팬 Talk 응원글 등록 시 언어 코드가 null인 경우 파파고 언어 감지 API를 호출하는 기능 추가

src/main/kotlin/kr/co/vividnext/sodalive/content/LanguageDetectEvent.kt

@@ -2,6 +2,7 @@ package kr.co.vividnext.sodalive.content
 
 import kr.co.vividnext.sodalive.chat.character.comment.CharacterCommentRepository
 import kr.co.vividnext.sodalive.content.comment.AudioContentCommentRepository
+import kr.co.vividnext.sodalive.explorer.profile.CreatorCheersRepository
 import org.slf4j.LoggerFactory
 import org.springframework.beans.factory.annotation.Value
 import org.springframework.http.HttpEntity
@@ -22,7 +23,8 @@ import org.springframework.web.client.RestTemplate
 enum class LanguageDetectTargetType {
     CONTENT,
     COMMENT,
-    CHARACTER_COMMENT
+    CHARACTER_COMMENT,
+    CREATOR_CHEERS
 }
 
 class LanguageDetectEvent(
@@ -40,6 +42,7 @@ class LanguageDetectListener(
     private val audioContentRepository: AudioContentRepository,
     private val audioContentCommentRepository: AudioContentCommentRepository,
     private val characterCommentRepository: CharacterCommentRepository,
+    private val creatorCheersRepository: CreatorCheersRepository,
 
     @Value("\${cloud.naver.papago-client-id}")
     private val papagoClientId: String,
@@ -67,6 +70,7 @@ class LanguageDetectListener(
             LanguageDetectTargetType.CONTENT -> handleContentLanguageDetect(event)
             LanguageDetectTargetType.COMMENT -> handleCommentLanguageDetect(event)
             LanguageDetectTargetType.CHARACTER_COMMENT -> handleCharacterCommentLanguageDetect(event)
+            LanguageDetectTargetType.CREATOR_CHEERS -> handleCreatorCheersLanguageDetect(event)
         }
     }
 
@@ -166,6 +170,37 @@ class LanguageDetectListener(
         )
     }
 
+    private fun handleCreatorCheersLanguageDetect(event: LanguageDetectEvent) {
+        val cheersId = event.id
+
+        val cheers = creatorCheersRepository.findById(cheersId).orElse(null)
+        if (cheers == null) {
+            log.warn("[PapagoLanguageDetect] CreatorCheers not found. cheersId={}", cheersId)
+            return
+        }
+
+        // 이미 언어 코드가 설정된 경우 호출하지 않음
+        if (!cheers.languageCode.isNullOrBlank()) {
+            log.debug(
+                "[PapagoLanguageDetect] languageCode already set. Skip language detection. cheersId={}, languageCode={}",
+                cheersId,
+                cheers.languageCode
+            )
+            return
+        }
+
+        val langCode = requestPapagoLanguageCode(event.query, cheersId) ?: return
+
+        cheers.languageCode = langCode
+        creatorCheersRepository.save(cheers)
+
+        log.info(
+            "[PapagoLanguageDetect] languageCode updated from Papago. cheersId={}, langCode={}",
+            cheersId,
+            langCode
+        )
+    }
+
     private fun requestPapagoLanguageCode(query: String, targetIdForLog: Long): String? {
         return try {
             val headers = HttpHeaders().apply {

src/main/kotlin/kr/co/vividnext/sodalive/explorer/ExplorerService.kt

@@ -3,6 +3,8 @@ package kr.co.vividnext.sodalive.explorer
 import kr.co.vividnext.sodalive.common.SodaException
 import kr.co.vividnext.sodalive.content.AudioContentService
 import kr.co.vividnext.sodalive.content.ContentType
+import kr.co.vividnext.sodalive.content.LanguageDetectEvent
+import kr.co.vividnext.sodalive.content.LanguageDetectTargetType
 import kr.co.vividnext.sodalive.content.SortType
 import kr.co.vividnext.sodalive.content.series.ContentSeriesService
 import kr.co.vividnext.sodalive.explorer.follower.GetFollowerListResponse
@@ -456,6 +458,17 @@ class ExplorerService(
         }
 
         cheersRepository.save(cheers)
+
+        // 언어 코드가 지정되지 않은 경우, 파파고 언어 감지 API를 통해 비동기로 언어를 식별한다.
+        if (request.languageCode.isNullOrBlank()) {
+            applicationEventPublisher.publishEvent(
+                LanguageDetectEvent(
+                    id = cheers.id!!,
+                    query = request.content,
+                    targetType = LanguageDetectTargetType.CREATOR_CHEERS
+                )
+            )
+        }
     }
 
     fun getCreatorProfileCheers(