chore: bump polars from 1.41.2 to 1.42.0 (#664)

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Author: dependabot[bot]

poetry.lock

@@ -41,7 +41,7 @@ darglint = "^1.8.1"
 mypy = "^2.1"
 myst-parser = "^4.0.1"
 nox = "^2025.11.12"
-polars = ">=1.41.2"
+polars = ">=1.42.0"
 pre-commit = "^4.6.0"
 pytest = ">=9.1.0"
 # pytest-regtest compat https://gitlab.com/uweschmitt/pytest-regtest/-/merge_requests/9