- Add subuser ID management to `selfserve_lane_command_arguments`.
- Update `invoice` function to include optional command arguments.
- Attach metadata to orders with self-serve and subuser details.
- Introduce `OTHER_TYPE_SELF_SERVE_WASH` in `attachment_content`.
- Introduced tests for validating note requirements on order items.
- Updated subuser route management contract tests with new route coverage.
- Added endpoints to manage department lane and self-serve lane statuses, with associated tests.