[LABIMP - 6908 ] fix the check_export_status function (#5)

* [LABIMP-6908] Add export status checking and download URL fetching functionality

* [LABIMP-6908] Refactor error messages for consistency and update API URLs to use BASE_URL constant .

* [LABIMP-6908] resolve issues of check_export_status

Author: TheLunarLogic

labellerr/client.py

@@ -77,6 +77,7 @@ def get_direct_upload_url(self, file_name, client_id, purpose='pre-annotations')
             tracking_id = str(uuid.uuid4())
             logging.exception(f"Error getting direct upload url: {response.text}")
             raise LabellerrError({
+                'status': 'Internal server error',
                 'status': 'Internal server error',
                 'message': 'Please contact support with the request tracking id',
                 'request_id': tracking_id
@@ -975,9 +976,6 @@ def check_export_status(self, api_key, api_secret, project_id, report_ids, clien
                         export_id=status_item["report_id"],
                         client_id=client_id
                     )
-        
-                    # Add download URL to response
-                    status_item["url"] = download_url
 
             return json.dumps(result, indent=2)