feat: add contract extension request functionality

- Implemented  method in  to allow customers to request an extension for expired contracts.
- Added  component in  for users to initiate extension requests.
- Updated  to include logic for handling extension requests for expired contracts.
- Enhanced  to display extension request options and status.
- Created migration to add  and  columns to the contracts table.
- Added unit tests for contract extension request and handling in .
- Defined DTOs for request and extension in .
- Updated types in  to include new fields related to contract extensions.

apps/edr-freight-api/src/modules/contracts/entities/contract-review-note.entity.ts

@@ -19,6 +19,10 @@ export const CONTRACT_REVIEW_NOTE_TYPES = [
   'SUSPENSION_LIFTED',
   /** Customer cancelled their own contract; body is their reason. */
   'CANCELLATION',
+  /** Customer asked for an EXPIRED contract's validity to be extended. */
+  'EXTENSION_REQUESTED',
+  /** Staff extended the validity; body records the days added and the new end. */
+  'EXTENDED',
 ] as const;
 export type ContractReviewNoteType =
   (typeof CONTRACT_REVIEW_NOTE_TYPES)[number];