Marks an open lead as won and hands it to production. This creates one job per property on the
deal (each starting in the schedule state), moves any estimates and other pre-sale records onto
those jobs, promotes the homeowner from prospect to customer, and logs the win on the lead's
activity timeline. The response's job field points to the new job.

Pass contract_amount to set the signed contract value; otherwise the lead's estimated_value
is used. The lead must have a contact. The token's role must be allowed to work sales, and
unless it can act on every record, the lead must be assigned to the token's user.