- 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.
- Add broker-related configuration classes (`broker_url`, `public_broker_url`, `auth_mode`, `shared_secret`) to support edge gateway functionality.
- Enhance `SelfserveRoute` with routes for managing self-serve wash sessions, including session listing, detail retrieval, and forced lane stop.
- Update unit tests to validate new configuration handling, session routes, and OpenAPI endpoint coverage.
- Include default environment variables for broker settings in `docker-compose.example.yml`.