fix: validate card spending limit before transfering to child

src/card/dtos/requests/fund-iban.request.dto.ts

@@ -0,0 +1,7 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { TransferToJuniorRequestDto } from '~/junior/dtos/request';
+
+export class FundIbanRequestDto extends TransferToJuniorRequestDto {
+  @ApiProperty({ example: 'DE89370400440532013000' })
+  iban!: string;
+}