Burr 0.42.0 release prep#646

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elijahbenizzy wants to merge 9 commits intomainfrom

Commits on Feb 2, 2026

Replace non-standard license headers in 6 notebooks
Elijah ben Izzy
committed
Add Apache license headers to 33 notebooks
Elijah ben Izzy
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Add twine verification to wheel build process
Elijah ben Izzy
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Document twine requirement in release process
Elijah ben Izzy
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Add twine-check command for voter verification
Elijah ben Izzy
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Truncate pyproject.toml description to single line
Elijah ben Izzy
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Improve twine validation error messages
Elijah ben Izzy
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Bump version to 0.42.0
Elijah ben Izzy
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Replace copyright headers in config files with Apache standard
Elijah ben Izzy
committed