- Introduced `selfserve_enabled` property for `department_lanes` with schema update, object properties, and associated methods/tests. - Enhanced `selfserve_wash_flow` and session logic to respect lane self-serve settings, including block handling and task filtering. - Updated API routes and Studio Graph projections to include `selfserve_enabled` in payloads and progress callbacks. - Added unit tests for session statuses, lane configuration, and blocking behavior due to disabled self-serve settings.