fix(live-recommend): 팔로잉 전체 채널 조회의 group by 오류를 수정한다

docs/20260313_라이브추천팔로잉전체채널조회그룹바이오류수정.md

@@ -0,0 +1,14 @@
+- [x] getFollowingAllChannelList 오류 재현 경로와 원인 쿼리 위치를 확인한다.
+- [x] only_full_group_by 호환 방식으로 조회 쿼리를 수정한다.
+- [x] 관련 응답/페이징 동작이 유지되는지 확인한다.
+- [x] 변경 파일 진단과 테스트/빌드를 수행한다.
+
+## 검증 기록
+
+### 1차 구현
+- 무엇을: `getCreatorFollowingAllList` 쿼리의 `groupBy` 컬럼을 `member.id`, `member.nickname`, `member.profileImage`, `creatorFollowing.isNotify`로 확장하고, 회귀 방지를 위해 `LiveRecommendRepositoryTest.shouldReturnFollowingCreatorListWithNotifyFlag` 테스트를 추가했다.
+- 왜: `only_full_group_by` 모드에서 SELECT에 포함된 비집계 컬럼(`creatorFollowing.isNotify`)이 GROUP BY에 없어 발생하는 SQL 오류를 제거하고, 팔로잉 목록 응답(`isNotify` 포함) 동작을 재검증하기 위해서다.
+- 어떻게:
+  - 명령: `./gradlew test --tests "kr.co.vividnext.sodalive.live.recommend.LiveRecommendRepositoryTest.shouldReturnFollowingCreatorListWithNotifyFlag"` / 결과: 성공
+  - 명령: `./gradlew build` / 결과: 성공
+  - 명령: `lsp_diagnostics` / 결과: `.kt` 확장 LSP 미구성으로 실행 불가(대신 Gradle 컴파일/테스트 성공으로 검증)

src/main/kotlin/kr/co/vividnext/sodalive/live/recommend/LiveRecommendRepository.kt

@@ -262,7 +262,12 @@ class LiveRecommendRepository(
             .from(creatorFollowing)
             .innerJoin(creatorFollowing.creator, member)
             .where(where)
-            .groupBy(member.id)
+            .groupBy(
+                member.id,
+                member.nickname,
+                member.profileImage,
+                creatorFollowing.isNotify
+            )
             .offset(offset)
             .limit(limit)
             .fetch()

src/test/kotlin/kr/co/vividnext/sodalive/live/recommend/LiveRecommendRepositoryTest.kt

@@ -7,6 +7,7 @@ import kr.co.vividnext.sodalive.member.MemberRepository
 import kr.co.vividnext.sodalive.member.MemberRole
 import kr.co.vividnext.sodalive.member.block.BlockMember
 import kr.co.vividnext.sodalive.member.block.BlockMemberRepository
+import kr.co.vividnext.sodalive.member.following.CreatorFollowing
 import org.junit.jupiter.api.Assertions.assertEquals
 import org.junit.jupiter.api.BeforeEach
 import org.junit.jupiter.api.Test
@@ -72,12 +73,38 @@ class LiveRecommendRepositoryTest @Autowired constructor(
         assertEquals(creator.id, result[0].creatorId)
     }
 
+    @Test
+    fun shouldReturnFollowingCreatorListWithNotifyFlag() {
+        val viewer = saveMember(nickname = "viewer-following", role = MemberRole.USER)
+        val creatorA = saveMember(nickname = "creator-following-a", role = MemberRole.CREATOR)
+        val creatorB = saveMember(nickname = "creator-following-b", role = MemberRole.CREATOR)
+
+        saveFollowing(member = viewer, creator = creatorA, isNotify = true)
+        saveFollowing(member = viewer, creator = creatorB, isNotify = false)
+
+        entityManager.flush()
+        entityManager.clear()
+
+        val result = liveRecommendRepository.getCreatorFollowingAllList(
+            memberId = viewer.id!!,
+            offset = 0,
+            limit = 20,
+            isBlocked = { false }
+        )
+
+        assertEquals(2, result.size)
+        val isNotifyByCreatorId = result.associate { it.creatorId to it.isNotify }
+        assertEquals(true, isNotifyByCreatorId[creatorA.id])
+        assertEquals(false, isNotifyByCreatorId[creatorB.id])
+    }
+
     private fun saveMember(nickname: String, role: MemberRole): Member {
         return memberRepository.saveAndFlush(
             Member(
                 email = "$nickname@test.com",
                 password = "password",
                 nickname = nickname,
+                profileImage = "profile/default-profile.png",
                 role = role
             )
         )
@@ -101,4 +128,14 @@ class LiveRecommendRepositoryTest @Autowired constructor(
         block.blockedMember = blockedMember
         blockMemberRepository.saveAndFlush(block)
     }
+
+    private fun saveFollowing(member: Member, creator: Member, isNotify: Boolean) {
+        val following = CreatorFollowing(
+            isNotify = isNotify,
+            isActive = true
+        )
+        following.member = member
+        following.creator = creator
+        entityManager.persist(following)
+    }
 }