v0.3.1 — LICENSE + ruff/CI hygiene

Repository hygiene + public-launch prep. No CLI or MCP surface changes.

Added

• LICENSE file (MIT) shipped in sdist + wheel
• [project.urls] entries for Repository, Issues, Changelog
• GitHub Actions CI: pytest + ruff on Python 3.10-3.13
• README documents CODEOFPAPER_TIMEOUT env var

Fixed

• CLI error output no longer shows spurious During handling of the above exception… tail (21 raise ... from None/exc sites)

Internal

• Ruff lint config under [tool.ruff.lint]
• contextlib.suppress for MCP UA override
• Optional[X] → X | None, typing.Sequence → collections.abc
• Unused imports removed
• 339 tests pass, ruff clean

PyPI: https://pypi.org/project/codeofpaper/0.3.1/