v4.0.0 Breaking changes: * Migrate to psycopg3 * grouper: Add type annotations Bug fixes: * cli/sentry: Fix issues with the extract-scheduler-tasks command * cli/sentry: Add --policy option to extract-scheduler-tasks command Internal: * tests: Remove no longer needed pytest custom marker named db * test_rpc_client: Fix flake8 warnings * db/db_utils: Fix black formatting * Apply swh-py-template v0.3.3 with copier