Tell Prescience the client wants to move forward

Records the request on the group (move_forward: status, time and who) and tells Prescience, which sets up enrollment on the plan of the group’s current quote. The group needs a quote that is ready for its current census: before the first quote, or while an edited census is being repriced, this returns 409 quote_not_ready. A second request changes nothing and returns the first one with 200. The body is optional. Field names are snake_case for broker keys. HR platform partners use camelCase (company_name is companyName).