Submit verification feedback for a phone number returned by a Forager person lookup. Required fields: phone_number (any format; it is normalised to E.164 before storage) and contact_status (one of connected or disconnected, reflecting the live-call outcome). Optional: is_correct_person (boolean — did the call confirm the number belongs to the matched person). Omit it, or send null, when the call could not answer that question — a disconnected number never reaches anyone, so there is nobody to identify. Omitted and null are both stored and returned as null, meaning "unknown", which is deliberately distinct from false ("this is the wrong person"). Also optional: name (the person's name the caller believes the number belongs to, e.g. John Doe) and person_id (associate the row with a specific Forager person ID). Every submission creates a new row with 201 Created; repeat submissions for the same contact are preserved as separate rows.