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

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")) }
         )
     }