feat: fix the settings preview for the business licence and changes request to the approval

apps/edr-freight-api/src/modules/files/files.service.ts

@@ -124,6 +124,15 @@ export class FilesService {
     await this.filesRepository.softDelete(id);
   }
 
+  /**
+   * Re-slot a stored file under a new `code` (e.g. promote a staged
+   * `business_license_pending` file to the live `business_license` code once a
+   * change request is approved). Bytes and URL are untouched.
+   */
+  async setCode(id: string, code: string): Promise<void> {
+    await this.filesRepository.update(id, { code });
+  }
+
   findByResource(resourceId: string, resource: string): Promise<FileRecord[]> {
     return this.filesRepository.findByResource(resourceId, resource);
   }