feat: ScheduleId를 이용한 ScheduleOverview 단건 조회 기능 추가

src/main/kotlin/roomescape/schedule/business/ScheduleService.kt

@@ -69,6 +69,16 @@ class ScheduleService(
         throw ScheduleException(ScheduleErrorCode.SCHEDULE_NOT_AVAILABLE)
     }
 
+    @Transactional(readOnly = true)
+    fun findScheduleOverviewById(id: Long): ScheduleOverviewResponse {
+        val overview: ScheduleOverview = scheduleRepository.findOverviewByIdOrNull(id) ?: run {
+            log.warn { "[ScheduleService.findScheduleOverview] 일정 개요 조회 실패: id=$id" }
+            throw ScheduleException(ScheduleErrorCode.SCHEDULE_NOT_FOUND)
+        }
+
+        return overview.toOverviewResponse()
+    }
+
     // ========================================
     // All-Admin (본사, 매장 모두 사용가능)
     // ========================================

src/main/kotlin/roomescape/schedule/infrastructure/persistence/ScheduleRepository.kt

@@ -53,4 +53,29 @@ interface ScheduleRepository : JpaRepository<ScheduleEntity, Long> {
         date: LocalDate,
         themeId: Long? = null
     ): List<ScheduleOverview>
+
+    @Query("""
+        SELECT 
+            new roomescape.schedule.business.domain.ScheduleOverview(
+                s._id,
+                st._id,
+                st.name,
+                s.date,
+                s.time,
+                t._id,
+                t.name,
+                t.difficulty,
+                t.availableMinutes,
+                s.status
+            )   
+        FROM    
+            ScheduleEntity s
+        JOIN
+            ThemeEntity t ON t._id = s.themeId
+        JOIN
+            StoreEntity st ON st._id = s.storeId
+        WHERE
+            s._id = :id
+    """)
+    fun findOverviewByIdOrNull(id: Long): ScheduleOverview?
 }

src/main/kotlin/roomescape/schedule/web/ScheduleDto.kt

@@ -54,3 +54,25 @@ fun ScheduleEntity.toSummaryResponse() = ScheduleSummaryResponse(
     themeId = this.themeId,
     status = this.status
 )
+
+data class ScheduleOverviewResponse(
+    val id: Long,
+    val storeId: Long,
+    val storeName: String,
+    val date: LocalDate,
+    val startFrom: LocalTime,
+    val endAt: LocalTime,
+    val themeId: Long,
+    val themeName: String,
+)
+
+fun ScheduleOverview.toOverviewResponse() = ScheduleOverviewResponse(
+    id = this.id,
+    storeId = this.storeId,
+    storeName = this.storeName,
+    date = this.date,
+    startFrom = this.time,
+    endAt = this.getEndAt(),
+    themeId = this.themeId,
+    themeName = this.themeName,
+)