This release significantly improves the project's maintainability, testability,
and documentation structure, alongside adding support for Python 3.13.
- **Testing & Coverage**:
- Achieved near 100% unit test coverage for core modules.
- Configured `pytest-cov` for automatic coverage reporting and a 90% threshold.
- Implemented automatic `unit` and `integration` markers for tests.
- Added an `autouse` fixture to reset `PIIRegistry` for test isolation.
- Excluded `dev/` tools from coverage reports.
- **Documentation**:
- Restructured `docs/` folders (`en_EN` -> `en`, `ru_RU` -> `ru`, `guide` -> `tasks`).
- Moved `api/` documentation under `en/api/`.
- Updated `mkdocs.yml` and all internal Markdown links to reflect new structure.
- Refactored root `README.md` to conform to `DocArchitect:StructurePolicy` (Layer 5).
- Ensured `dev` module is properly linked and documented in API reference.
- **Code Quality**:
- Resolved all Mypy type-hinting errors.
- Fixed Ruff linting issues (`SIM117`, `SIM118`).
- **Compatibility**:
- Added official support for Python 3.13.
This update ensures the project adheres to modern development standards and
provides a more robust and well-documented codebase.