feat(creator): 채널 홈 조회 정책을 추가한다

src/main/kotlin/kr/co/vividnext/sodalive/v2/creator/channel/domain/CreatorChannelHomeQueryPolicy.kt

@@ -0,0 +1,37 @@
+package kr.co.vividnext.sodalive.v2.creator.channel.domain
+
+import kr.co.vividnext.sodalive.v2.common.domain.CreatorActivityType
+import java.time.LocalDateTime
+
+class CreatorChannelHomeQueryPolicy {
+    fun limitSchedules(
+        schedules: List<CreatorChannelSchedule>,
+        now: LocalDateTime
+    ): List<CreatorChannelSchedule> {
+        return schedules
+            .filter { it.scheduledAt > now }
+            .sortedWith(compareBy<CreatorChannelSchedule> { it.scheduledAt }.thenBy { it.type.scheduleOrder() })
+            .take(3)
+    }
+
+    fun excludeLatestAudioContent(
+        audioContents: List<CreatorChannelAudioContent>,
+        latestAudioContentId: Long?
+    ): List<CreatorChannelAudioContent> {
+        return audioContents.filter { it.audioContentId != latestAudioContentId }
+    }
+
+    fun markFirstAudioContent(audioContents: List<CreatorChannelAudioContent>): List<CreatorChannelAudioContent> {
+        val firstAudioContentId = audioContents
+            .minWithOrNull(compareBy<CreatorChannelAudioContent> { it.publishedAt }.thenBy { it.audioContentId })
+            ?.audioContentId
+
+        return audioContents.map { audioContent ->
+            audioContent.copy(isFirstContent = audioContent.audioContentId == firstAudioContentId)
+        }
+    }
+
+    private fun CreatorActivityType.scheduleOrder(): Int {
+        return if (this == CreatorActivityType.LIVE) 0 else 1
+    }
+}