feat(bookings): two-level clearance charges (port + misc) billed to customer with invoices

apps/edr-freight-api/src/modules/bookings/dto/clearance-charge.dto.ts

@@ -0,0 +1,16 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { Type } from 'class-transformer';
+import { IsNumber, IsPositive, IsString, Length } from 'class-validator';
+
+export class BillClearanceChargeDto {
+  @ApiProperty({ example: 12500.5 })
+  @Type(() => Number)
+  @IsNumber()
+  @IsPositive()
+  amount!: number;
+
+  @ApiProperty({ example: 'ETB' })
+  @IsString()
+  @Length(3, 8)
+  currency!: string;
+}