All routes (assistant, migration, datasets, git) now use AsyncSupersetClient. _helpers.py sync->async for dashboard ref resolution. _detail_routes.py import fixed. Known residual: MigrationDryRunService and IdMappingService still sync.
All routes (assistant, migration, datasets, git) now use AsyncSupersetClient. _helpers.py sync->async for dashboard ref resolution. _detail_routes.py import fixed. Known residual: MigrationDryRunService and IdMappingService still sync.