Judge the newest ~30 s of an in-progress visit against the sales process

Transcribes one short audio chunk and returns which process steps are covered, the step the conversation is on, and at most one nudge (an earlier step still open while a later one is under way). The phone holds the state and sends it back each time; the server stores no audio or transcript. It does keep the step progress per visit (which steps are covered, when in the recording, the current step) so managers can follow the visit in "In the field"; the conversation context is never stored. No feature flag; requires an active assignment of the visit to the caller, a scorecard with steps, and the workspace's own AI key.