Enhance wagon capacity handling and validation in booking service

- Added default capacities for container and bulk wagons.
- Updated wagonsFor method to consider weight and length for wagon calculations.
- Improved handling of overweight bookings with appropriate warnings.
- Adjusted tests to reflect changes in wagon capacity and validation logic.

apps/edr-freight-api/src/modules/train-scheduling/dto/assign-bookings.dto.ts

@@ -51,7 +51,7 @@ export class AssignBookingsDto {
   @IsUUID('4', { each: true })
   bookingIds!: string[];
 
-  @ApiPropertyOptional({ description: 'Bypass soft hold and overweight warnings' })
+  @ApiPropertyOptional({ description: 'Suppress soft hold and overweight warnings' })
   @IsOptional()
   @IsBoolean()
   forceAssign?: boolean;