feat(freight): add company logo setting applied to every generated document

New logo-settings module (mirrors stamp-settings): single uploaded logo,
stored via FilesService/MinIO, injected as a data URL into invoice/receipt,
contract, warehouse, train-scheduling, and payment-receipt PDFs. Adds a
matching backoffice settings page and settings:logo:view/manage permissions.

>

apps/edr-freight-api/src/modules/train-scheduling/services/train-scheduling.service.spec.ts

@@ -181,6 +181,7 @@ describe('TrainSchedulingService', () => {
         autoArriveAtFinalYard: jest.fn().mockResolvedValue([]),
       } as never, // bookingJourneyService
       { dispatched: jest.fn(), arrived: jest.fn() } as never, // bookingNotifier
+      { getLogoImageUrl: jest.fn().mockResolvedValue(null) } as never, // logoSettings
     );
 
     const defaultFleetWagons = [