CF Access multi-aud: CF_ACCESS_AUD now accepts a comma-separated
allow-list so requests through either the void.hynesy.com or
void2-app.hynesy.com CF Access app are honoured as owner. Fails
closed; unlisted auds rejected. Adds multi-aud test.
Void 1 (CT 301) becomes legacy but stays running untouched as an
instant rollback. -alpha tag kept pending owner sign-off.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>