tests: ignore attr-defined errors for fake dotenv in test_config.py

[github-actions]

Summary

Mypy currently reports attr-defined errors because types.ModuleType has no dotenv_values attribute. We fake a dotenv module in tests but haven’t told mypy about it.

Affected file

• tests/test_config.py

Implementation Details

Added inline # type: ignore[attr-defined] comments to the two fake_dotenv.dotenv_values assignments to suppress these mypy errors in tests.

Assumptions

• Only tests in tests/test_config.py require this change. No changes to production code needed.

Testing

• uv run mypy tests/test_config.py — no issues found.
• uv run pytest tests/test_config.py — tests pass.

Considerations

Chose inline type ignores for minimal impact and to keep tests clear. Alternatively could configure mypy to ignore the entire file, but inline ignores are more targeted.