A fresh install invites agent and fingerprint setup once a link is up
A fresh install saw the agent invitation only after the first update, and the fingerprint invitation waited the same way. The first-run wifi step merged into quattro sends both once a link is up, before the update check.
A fresh install saw the default-agent invitation only after the first update, because first run installed it as a post-update hook. The fingerprint invitation waited the same way. Both setups install packages, so what they need is a connection.
The first-run wifi step sends both invitations when a link is up, before the update check. The provision step does not install them as post-update hooks. Markers keep anyone from being invited twice. The pull request merged into quattro.