v0.3.0

Refactor test docstrings and imports in auto app update tests

- Expand module docstring to clarify test coverage
- Improve multi-line docstring formatting for consistency
- Remove unused imports (SimpleNamespace, call)
- Remove noqa comments for PLC0415 (import-outside-toplevel)
- Rename test methods to use snake_case for boolean values (True→true, False→false)
- Condense integration test class docstring for brevity