feat: Implement general contract booking orders functionality

- Add DTOs for creating booking orders and viewing contract quantities.
- Create entities for booking orders and booking order lines.
- Implement service for managing general contract operations, including activation after payment and retrieving quantity lines.
- Develop UI components for contract detail and list pages, including order placement dialog.
- Integrate API service for booking orders, enabling listing and creating orders against contracts.
- Enhance contract status display and quantity pool visualization in the UI.

apps/edr-freight-api/src/modules/rule-engine/dto/create-cargo-type.dto.ts

@@ -1,5 +1,6 @@
 import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
-import { IsBoolean, IsInt, IsOptional, IsString, IsUUID, MaxLength, Min } from 'class-validator';
+import { CargoUnitOfMeasure } from '@edr/types';
+import { IsBoolean, IsEnum, IsInt, IsOptional, IsString, IsUUID, MaxLength, Min } from 'class-validator';
 
 export class CreateCargoTypeDto {
   @ApiProperty({ description: 'Cargo type display name', maxLength: 255 })
@@ -7,6 +8,14 @@ export class CreateCargoTypeDto {
   @MaxLength(255)
   cargoTypeName!: string;
 
+  @ApiPropertyOptional({
+    enum: CargoUnitOfMeasure,
+    description: 'How this cargo is measured (PER_TON for bulk, PER_ITEM for break-bulk)',
+  })
+  @IsOptional()
+  @IsEnum(CargoUnitOfMeasure)
+  unitOfMeasure?: CargoUnitOfMeasure;
+
   @ApiPropertyOptional({ description: 'Parent group ID for hierarchical cargo types' })
   @IsOptional()
   @IsUUID()