Conform to the vendor-neutral github-discipline canon: the commit-msg and
pre-commit hooks and check-style.sh now reject AI attribution for every
assistant (Codex, Copilot, Gemini, ChatGPT, OpenAI, Anthropic), not just
Claude and Cursor. The no-cursor-attribution workflow is excluded from the
file-content scan since it legitimately quotes the tokens to detect them.
Also wire scripts/check-roadmap.sh into check-style.sh (and grant the CI gates
step issues:read + a token for the epic-coverage query), per the rule that the
roadmap gate runs in the style check.