Add Python 3.14 support#428

Draft

Copilot wants to merge 2 commits intoadd-python3.14from

copilot/sub-pr-402-yet-again

Commits on Feb 26, 2026

Initial plan
Copilot
committed
Address code review comments: DB cleanup, break, sleep comment, setuptools version, manager comment, polling comment, race detection

Copilot
and
forsyth2
committed