feat(admin-character): 캐릭터 수정 API

- 태그 중복 매핑이 되지 않도록 수정

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

@@ -72,7 +72,7 @@ class ChatCharacter(
     @OneToMany(mappedBy = "chatCharacter", cascade = [CascadeType.ALL], fetch = FetchType.LAZY)
     var relationships: MutableList<ChatCharacterRelationship> = mutableListOf()
 
-    @OneToMany(mappedBy = "chatCharacter", cascade = [CascadeType.ALL], fetch = FetchType.LAZY)
+    @OneToMany(mappedBy = "chatCharacter", cascade = [CascadeType.ALL], fetch = FetchType.LAZY, orphanRemoval = true)
     var tagMappings: MutableList<ChatCharacterTagMapping> = mutableListOf()
 
     @OneToMany(mappedBy = "chatCharacter", cascade = [CascadeType.ALL], fetch = FetchType.LAZY)

src/main/kotlin/kr/co/vividnext/sodalive/chat/character/service/ChatCharacterService.kt

@@ -120,7 +120,7 @@ class ChatCharacterService(
      */
     @Transactional
     fun addTagsToCharacter(chatCharacter: ChatCharacter, tags: List<String>) {
-        tags.forEach { addTagToCharacter(chatCharacter, it) }
+        tags.distinct().forEach { addTagToCharacter(chatCharacter, it) }
     }
 
     /**