#3418 chore: Use ty for type checking Pull request opened by edgarrmondragon ## Summary by Sourcery Introduce a dedicated typing Nox/CI workflow using the ty type checker alongside mypy adjustments and minor typing suppressions across the codebase. Enhancements: • Tag mypy and new ty Nox sessions for typing, ensuring Python-version-aware type checking. • Relax or adjust type hints and operations with targeted ty ignore annotations to satisfy the new type checker. • Make the plugin flattening config TypedDict partially optional by marking it total=False. Build: • Add ty as a typing dependency in pyproject.toml. CI: • Add a separate GitHub Actions job to run Nox sessions tagged as typing across multiple Python versions. Documentation: • Update contributor documentation to describe how to run the new typing Nox sessions locally. meltano/sdk