CI: change docformatter to ruff? #41

Problem

Per Claude, some of our docformatter issues are endemic: "4. Switch to a maintained alternative
docformatter has been fairly stagnant. If Python 3.14 support matters to you, consider swapping to ruff (with --fix for docstring formatting) which is actively maintained and has no such issues."

Proposed solution

for reliable builds on 3.14 use ruff instead of docformatter?