add per-container handling options for hazardous, reefer, and return services

- Introduced new boolean fields (isHazardous, isReefer, isReturn) in UnitDraft and related interfaces to allow individual container handling options.
- Updated emptyUnit function to initialize these new fields.
- Modified GlCreateBookingForm to handle and display these options for each container.
- Adjusted calculations for hazardous, reefer, and return quantities based on the new handling options.
- Updated the schema for container units and booking container lines to include handling options.
- Added migration to support the new return flag in the database.
- Enhanced various components to reflect gross weight calculations, ensuring consistency across the application.

apps/edr-freight-api/src/modules/bookings/booking-pricing.service.ts

@@ -305,6 +305,10 @@ export class BookingPricingService {
               vgmPerUnitTons: vgm,
               totalVgmTons: qty * vgm,
               isReefer: ct.isReefer,
+              // Per-container opt-ins — PER_CONTAINER surcharges bill these.
+              hazardousQuantity: Number(bc.hazardousQuantity ?? 0),
+              reeferQuantity: Number(bc.reeferQuantity ?? 0),
+              returnQuantity: Number(bc.returnQuantity ?? 0),
             },
             perWagon: containersPerWagonForSize(ct.sizeFt),
             quantity: qty,

apps/edr-freight-api/src/modules/bookings/entities/booking-container-unit.entity.ts

@@ -32,6 +32,10 @@ export class BookingContainerUnit extends BaseEntity {
   @Column({ name: 'is_reefer', type: 'boolean', default: false })
   isReefer!: boolean;
 
+  /** This container ships back empty after unloading (equipment return). */
+  @Column({ name: 'is_return', type: 'boolean', default: false })
+  isReturn!: boolean;
+
   @Column({ name: 'sort_order', type: 'smallint', default: 0 })
   sortOrder!: number;