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+Removed lint-only development tools (mypy, black, isort, ruff) from `requirements-dev.txt`; these remain available via the `dev` extra in `pyproject.toml`. This allows the CI matrix, including free-threaded Python job (3.13t + SQL Server 2019), to install dependencies successfully.
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	`1`	+Removed lint-only development tools (mypy, black, isort, ruff) from `requirements-dev.txt`; these remain available via the `dev` extra in `pyproject.toml`. This allows the CI matrix, including free-threaded Python job (3.13t + SQL Server 2019), to install dependencies successfully.