feat(home): 인기 커뮤니티 점수 정책을 변경한다

src/main/kotlin/kr/co/vividnext/sodalive/v2/recommendation/domain/RecommendationScorePolicy.kt

@@ -28,6 +28,16 @@ class RecommendationScorePolicy {
         }
     }
 
+    fun calculateCommunityCreatorNewBoost(debutAt: LocalDateTime, now: LocalDateTime): Double {
+        val days = ChronoUnit.DAYS.between(debutAt.toLocalDate(), now.toLocalDate())
+        return when {
+            days <= RecommendationScoreSpec.NEW_BOOST_10_DAY_LIMIT -> RecommendationScoreSpec.COMMUNITY_NEW_BOOST_10_DAYS
+            days <= RecommendationScoreSpec.NEW_BOOST_20_DAY_LIMIT -> RecommendationScoreSpec.COMMUNITY_NEW_BOOST_20_DAYS
+            days <= RecommendationScoreSpec.NEW_BOOST_30_DAY_LIMIT -> RecommendationScoreSpec.COMMUNITY_NEW_BOOST_30_DAYS
+            else -> RecommendationScoreSpec.DEFAULT_NEW_BOOST
+        }
+    }
+
     fun calculateDebutCreatorScore(
         followIncrease: Long,
         contentActivityScore: Long,

src/main/kotlin/kr/co/vividnext/sodalive/v2/recommendation/domain/RecommendationScoreSpec.kt

@@ -18,7 +18,7 @@ object RecommendationScoreSpec {
     const val CHEER_DONATION_COUNT_WEIGHT = 0.1
 
     const val COMMUNITY_LIKE_WEIGHT = 0.5
-    const val COMMUNITY_COMMENT_WEIGHT = 0.5
+    const val COMMUNITY_COMMENT_WEIGHT = 0.4
     const val COMMUNITY_FOLLOWER_WEIGHT = 0.1
 
     const val NEW_BOOST_10_DAYS = 1.5
@@ -30,5 +30,8 @@ object RecommendationScoreSpec {
     const val CHEER_NEW_BOOST_10_DAYS = 1.15
     const val CHEER_NEW_BOOST_20_DAYS = 1.10
     const val CHEER_NEW_BOOST_30_DAYS = 1.05
+    const val COMMUNITY_NEW_BOOST_10_DAYS = 1.15
+    const val COMMUNITY_NEW_BOOST_20_DAYS = 1.10
+    const val COMMUNITY_NEW_BOOST_30_DAYS = 1.05
     const val DEFAULT_NEW_BOOST = 1.0
 }

src/main/kotlin/kr/co/vividnext/sodalive/v2/recommendation/domain/RecommendationSnapshotWindowPolicy.kt

@@ -28,6 +28,11 @@ class RecommendationSnapshotWindowPolicy {
         )
     }
 
+    fun previousKstSevenDayUtcWindow(nowUtc: LocalDateTime): RecommendationSnapshotWindow {
+        val dayWindow = previousKstDayUtcWindow(nowUtc)
+        return dayWindow.copy(startUtc = dayWindow.startUtc.minusDays(6))
+    }
+
     companion object {
         private val UTC_ZONE: ZoneId = ZoneId.of("UTC")
         private val KST_ZONE: ZoneId = ZoneId.of("Asia/Seoul")