add company stamp upload functionality for contract signing

- Introduced StampUpload component for uploading company stamp images.
- Integrated stamp upload in contract signing modal, supporting PNG and JPG formats.
- Implemented validation for file type and size (max 5 MB).
- Added visual feedback for drag-and-drop functionality.
- Updated contract-related pages to handle duplicate contract alerts and pricing notices.
- Enhanced contract expiry management with a nightly sweep service.
- Added unit tests for new features and updated existing tests for contract handling.

apps/edr-freight-api/src/modules/contracts/contracts.module.ts

@@ -21,6 +21,7 @@ import { ContractTemplatesModule } from '../contract-templates/contract-template
 import { ContractsController } from './contracts.controller';
 import { ContractsService } from './contracts.service';
 import { ContractsRepository } from './contracts.repository';
+import { ContractExpiryService } from './contract-expiry.service';
 import { ContractPricingService } from './contract-pricing.service';
 import { ContractNotifierService } from './contract-notifier.service';
 import { ContractTransitionService } from './contract-transition.service';
@@ -105,6 +106,7 @@ import { ContractDocumentViewModelBuilder } from '../../contracts/contract-docum
   providers: [
     ContractsService,
     ContractsRepository,
+    ContractExpiryService,
     ContractPricingService,
     ContractNotifierService,
     ContractTransitionService,