chore: add pytest config option asyncio_default_fixture_loop_scope

Ref: pytest-dev/pytest-asyncio#924

pyproject.toml

@@ -74,6 +74,7 @@ allow-dunder-method-names = ["__get_pydantic_core_schema__"]
 addopts = "--doctest-modules"
 # https://github.com/pytest-dev/pytest-asyncio#auto-mode
 asyncio_mode = "auto"
+asyncio_default_fixture_loop_scope="function"
 markers = ["render_params", "source_pkg", "ui_file"]
 
 # This section is read automatically by Coverage.py when its working directory is .