- Renamed `getErrorMessage` to `extractErrorMessage` for clarity and to avoid confusion with the domain's `getMessageForErrorCode`.
- Introduced a deprecation notice for `getErrorMessage` to maintain backward compatibility.
- Updated various services and controllers to utilize the new `extractErrorMessage` function, ensuring consistent error handling across the application.
- Enhanced error handling in the `BillingController`, `SubscriptionsService`, and other modules to improve maintainability and clarity in API responses.
- Replaced inline error throwing with NotFoundException in the BillingController to enhance error handling and provide clearer responses for missing WHMCS client mappings.
- Updated multiple methods to ensure consistent error management across the controller, improving maintainability and clarity in API responses.
- Removed the domain mappings module, consolidating related types and schemas into the id-mappings feature.
- Updated import paths across the BFF to reflect the new structure, ensuring compliance with import hygiene rules.
- Cleaned up unused files and optimized the codebase for better maintainability and clarity.
