Prevent deleting amenities used by room types

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

@@ -13,4 +13,5 @@ interface RoomTypeRepo : JpaRepository<RoomType, UUID> {
     fun findByPropertyIdOrderByCode(propertyId: UUID): List<RoomType>
     fun existsByPropertyIdAndCode(propertyId: UUID, code: String): Boolean
     fun existsByPropertyIdAndCodeAndIdNot(propertyId: UUID, code: String, id: UUID): Boolean
+    fun existsByAmenitiesId(id: UUID): Boolean
 }