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/bookings/booking-pricing.service.ts

@@ -16,7 +16,7 @@ import {
   containersPerWagonForSize,
   wagonsPerUnitForSize,
 } from '../rule-engine/container-type.util';
-import { bulkItemWagonsRequired } from '../train-scheduling/train-capacity.util';
+import { bulkItemWagonsForAllowedTypes } from '../train-scheduling/train-capacity.util';
 import { BookingsRepository } from './bookings.repository';
 import { wagonRemainder } from './consolidation.service';
 import { GeneratePriceResponseDto, PriceLineItemDto } from './dto/generate-price-response.dto';
@@ -1188,8 +1188,9 @@ export class BookingPricingService {
       );
       if (!(capacity > 0)) return null;
       // Break-bulk (PER_ITEM): `tons` above is the item count; size by
-      // indivisible items instead of pretending the count is tonnage.
-      const byItems = bulkItemWagonsRequired(booking, capacity);
+      // indivisible items instead of pretending the count is tonnage. Best
+      // count across allowed wagon types, each capped by its items-fit.
+      const byItems = bulkItemWagonsForAllowedTypes(booking, cargo, capacity);
       if (byItems > 0) return byItems;
       return Math.max(1, Math.ceil(tons / capacity));
     } catch {