feat(claims): support optional accident sketch

src/claim-request-management/dto/capture-requirements-v2.dto.ts

@@ -42,6 +42,13 @@ export class RequiredDocumentItem {
     example: true,
   })
   preferUploadDuringCapture?: boolean;
+
+  @ApiProperty({
+    description:
+      'Whether this document is mandatory for workflow completion. Optional documents are uploadable but never included in remaining/progress counts.',
+    example: true,
+  })
+  required: boolean;
 }
 
 /**