Consume fpagent's fprint-device-status {available, device, captureAgentId}
in the /fingerprint wizard. Availability is tracked tri-state so an agent
that does not report it leaves capture working as before; the header tag
shows offline / no-scanner / ready, the capture panel warns, and capture is
disabled until a supported reader is attached.
Adds a vm-sandbox test for the wizard logic and the OpenSpec change
fpagent-device-availability, archived with the fingerprint-wizard spec.
adebisi-fa
548e33390c