fix(content-ranking): 랭킹 커버 이미지를 CDN URL로 변환한다

src/main/kotlin/kr/co/vividnext/sodalive/v2/content/ranking/application/AudioRankingQueryService.kt

@@ -2,6 +2,7 @@ package kr.co.vividnext.sodalive.v2.content.ranking.application
 
 import kr.co.vividnext.sodalive.member.Member
 import kr.co.vividnext.sodalive.member.contentpreference.MemberContentPreferenceService
+import kr.co.vividnext.sodalive.v2.common.domain.toCdnUrl
 import kr.co.vividnext.sodalive.v2.content.ranking.domain.AudioRanking
 import kr.co.vividnext.sodalive.v2.content.ranking.domain.AudioRankingItem
 import kr.co.vividnext.sodalive.v2.content.ranking.domain.AudioRankingType
@@ -9,6 +10,7 @@ import kr.co.vividnext.sodalive.v2.content.ranking.port.out.AudioRankingBlockPor
 import kr.co.vividnext.sodalive.v2.content.ranking.port.out.AudioRankingSnapshotPort
 import kr.co.vividnext.sodalive.v2.content.ranking.port.out.AudioRankingSnapshotRecord
 import org.slf4j.LoggerFactory
+import org.springframework.beans.factory.annotation.Value
 import org.springframework.stereotype.Service
 import java.time.ZoneOffset
 import java.time.ZonedDateTime
@@ -19,6 +21,8 @@ class AudioRankingQueryService(
     private val memberContentPreferenceService: MemberContentPreferenceService,
     private val blockPort: AudioRankingBlockPort,
     private val jobService: AudioRankingSnapshotJobService,
+    @Value("\${cloud.aws.cloud-front.host}")
+    private val cloudFrontHost: String,
     private val nowProvider: () -> ZonedDateTime = { ZonedDateTime.now() }
 ) {
     private val log = LoggerFactory.getLogger(javaClass)
@@ -105,7 +109,7 @@ class AudioRankingQueryService(
             rank = rank,
             rankChange = if (showRankChange && previousRank != null) previousRank - rank else null,
             isNew = showRankChange && previousRank == null,
-            coverImageUrl = coverImageUrl
+            coverImageUrl = coverImageUrl.toCdnUrl(cloudFrontHost)
         )
     }
 

src/test/kotlin/kr/co/vividnext/sodalive/v2/content/ranking/application/AudioRankingQueryServiceTest.kt

@@ -54,6 +54,10 @@ class AudioRankingQueryServiceTest {
         assertEquals(listOf(1, 2, 3), result.items.map { it.rank })
         assertEquals(listOf(1, -1, null), result.items.map { it.rankChange })
         assertEquals(listOf(false, false, true), result.items.map { it.isNew })
+        assertEquals(
+            listOf("https://cdn.test/cover-2.png", "https://cdn.test/cover-1.png", "https://cdn.test/cover-3.png"),
+            result.items.map { it.coverImageUrl }
+        )
         assertEquals(LocalDateTime.of(2026, 6, 8, 0, 0), snapshotPort.nowUtc)
         assertEquals(LocalDateTime.of(2026, 5, 31, 15, 0), snapshotPort.currentAggregationStartAtUtc)
     }
@@ -230,6 +234,7 @@ class AudioRankingQueryServiceTest {
             memberContentPreferenceService = memberContentPreferenceService,
             blockPort = blockPort,
             jobService = jobService,
+            cloudFrontHost = "https://cdn.test",
             nowProvider = { ZonedDateTime.of(2026, 6, 8, 9, 0, 0, 0, ZoneId.of("Asia/Seoul")) }
         )
     }