Runs used GitHub's artifact storage and cache service, which ran out of
the monthly included quota and blocked publishing. Caches and job
handoffs now stay on the self-hosted runner host, the desktop release
hands builds over through its draft release, and Windows waits for a
self-hosted runner instead of a GitHub-hosted one. A test enforces it.
Claude-Session: https://claude.ai/code/session_01R8L4XgqjAemFR2remB5hVY
Co-authored-by: Claude <noreply@anthropic.com>