fix: 회원의 예약 확정 여부를 확인하는 쿼리에서, 입력된 id가 없으면 예외를 던지는 문제 해결(-> false 반환)

src/main/java/roomescape/reservation/infrastructure/persistence/ReservationRepository.kt

@@ -27,14 +27,11 @@ interface ReservationRepository
 
     @Query("""
 		SELECT EXISTS (
-		   SELECT 1 FROM ReservationEntity r
+            SELECT 1
-		   WHERE r.theme.id = r2.theme.id
+            FROM ReservationEntity r
-		     AND r.reservationTime.id = r2.reservationTime.id
+            WHERE r.id = :id
-		     AND r.date = r2.date
                 AND r.reservationStatus != 'WAITING'
 		)
-		FROM ReservationEntity r2
-		WHERE r2.id = :id
 		""")
     fun isExistConfirmedReservation(@Param("id") reservationId: Long): Boolean