Closes#21
All 14 async test methods in tests/test_automated_data_fetcher.py were
missing @pytest.mark.asyncio. Without it, pytest collects them and
silently passes without executing the coroutine body, providing no
coverage.
Added explicit @pytest.mark.asyncio to each async def test_* method.
This makes the async intent unambiguous and is robust against any
future asyncio_mode configuration changes.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
