refactor: Pending 예약시 일정 검증을 위한 ReservationService에서 가져오는 ScheduleSummaryResponse에 holdExpiredAt 필드 추가

service/src/main/kotlin/com/sangdol/roomescape/schedule/web/ScheduleDto.kt

@@ -4,6 +4,7 @@ import com.sangdol.roomescape.schedule.business.domain.ScheduleOverview
 import com.sangdol.roomescape.schedule.infrastructure.persistence.ScheduleEntity
 import com.sangdol.roomescape.schedule.infrastructure.persistence.ScheduleStatus
 import com.sangdol.roomescape.theme.infrastructure.persistence.Difficulty
+import java.time.Instant
 import java.time.LocalDate
 import java.time.LocalTime
 
@@ -45,14 +46,16 @@ data class ScheduleSummaryResponse(
     val date: LocalDate,
     val time: LocalTime,
     val themeId: Long,
-    val status: ScheduleStatus
+    val status: ScheduleStatus,
+    val holdExpiredAt: Instant? = null
 )
 
 fun ScheduleEntity.toSummaryResponse() = ScheduleSummaryResponse(
     date = this.date,
     time = this.time,
     themeId = this.themeId,
-    status = this.status
+    status = this.status,
+    holdExpiredAt = this.holdExpiredAt
 )
 
 data class ScheduleOverviewResponse(