refactor: 주간스케줄 반환 정렬 (#51)

* fix: 주간 스케줄 저장 시 500에러 해결

* chore: 스케줄 시간 반환 포맷 변경

* chore: Reservation 엔티티 FK nullable 작성

* chore: nullable 삭제

* refactor: 주간스케줄 반환 정렬

src/main/java/com/keunsori/keunsoriserver/domain/admin/reservation/dto/response/WeeklyScheduleResponse.java

@@ -2,6 +2,7 @@
 
 import com.keunsori.keunsoriserver.domain.admin.reservation.domain.WeeklySchedule;
 import com.keunsori.keunsoriserver.global.util.DayOfWeekUtil;
+import lombok.Getter;
 
 import java.time.format.DateTimeFormatter;
 
@@ -19,4 +20,8 @@ public static WeeklyScheduleResponse from(WeeklySchedule weeklySchedule){
                 weeklySchedule.getEndTime().format(DateTimeFormatter.ofPattern("HH:mm"))
         );
     }
+
+    public int getDayOfWeekNum() {
+        return dayOfWeekNum;
+    }
 }

src/main/java/com/keunsori/keunsoriserver/domain/admin/reservation/service/AdminReservationService.java

@@ -18,6 +18,7 @@
 
 import java.time.LocalDate;
 import java.time.LocalTime;
+import java.util.Comparator;
 import java.util.List;
 import java.util.stream.Stream;
 
@@ -36,7 +37,8 @@ public class AdminReservationService {
 
     public List<WeeklyScheduleResponse> findAllWeeklySchedules() {
          return weeklyScheduleRepository.findAll()
-                 .stream().map(WeeklyScheduleResponse::from).toList();
+                 .stream().map(WeeklyScheduleResponse::from)
+                 .sorted(Comparator.comparing(WeeklyScheduleResponse::getDayOfWeekNum)).toList();
     }
 
     @Transactional