refactor(audio-recommendation): 성인 조회 정책 호출을 통일한다

src/main/kotlin/kr/co/vividnext/sodalive/v2/content/recommendation/application/AudioRecommendationQueryService.kt

@@ -116,7 +116,7 @@ class AudioRecommendationQueryService(
 
     private fun canViewAdultContent(member: Member?): Boolean {
         if (member == null) return false
-        return memberContentPreferenceService.getStoredPreference(member).isAdult
+        return memberContentPreferenceService.canViewAdultContent(member)
     }
 
     companion object {