576:    def test_start_materializes_and_queues(self, api, db):
592:    def test_pause_resume_cancel_flow(self, api, db):
616:    def test_resume_requires_pending(self, api, db):
630:    def test_progress_after_start(self, api, db):
642:    def test_recipients_monitor_table(self, api, db):
662:    def test_export_csv(self, api, db):
676:    def test_sse_stream_first_events(self, api, db):