add items per wagon map to cargo types and sync bulk rate units

- Implemented  in the  to manage the physical item capacity for each wagon type.
- Added a new migration to create the  column in the  table.
- Introduced  method in  to update rate units when cargo type unit of measure changes.
- Updated booking calculations to consider items per wagon for break-bulk cargo.
- Refactored various components to utilize the new items fit logic and ensure consistent date formatting across the application.
- Added tests for the new display timezone functionality to ensure consistent date/time representation across different user settings.

apps/edr-freight-api/src/modules/rule-engine/interfaces/rates.repository.interface.ts

@@ -28,6 +28,13 @@ export interface IRatesRepository {
   create(data: Partial<Rate>): Promise<Rate>;
   update(id: string, data: Partial<Rate>): Promise<Rate | null>;
   softDelete(id: string): Promise<void>;
+  /**
+   * Flip a commodity's PER_TON↔PER_ITEM rates to match its unit of measure.
+   * Both units bill the same stored quantity — only the name differs — so a
+   * uom change must rename the units or bookings keep quoting "per ton" for
+   * counted cargo. Returns the number of rates flipped.
+   */
+  syncBulkQuantityUnit(cargoTypeId: string, unitOfMeasure: 'PER_TON' | 'PER_ITEM'): Promise<number>;
 }
 
 export const RATES_REPOSITORY = Symbol('RATES_REPOSITORY');