Delete room images when deleting room

src/main/kotlin/com/android/trisolarisserver/repo/RoomStayRepo.kt

@@ -75,4 +75,11 @@ interface RoomStayRepo : JpaRepository<RoomStay, UUID> {
         order by r.roomNumber
     """)
     fun findActiveByPropertyIdWithDetails(@Param("propertyId") propertyId: UUID): List<RoomStay>
+
+    @Query("""
+        select case when count(rs) > 0 then true else false end
+        from RoomStay rs
+        where rs.room.id = :roomId
+    """)
+    fun existsByRoomId(@Param("roomId") roomId: UUID): Boolean
 }