AskRefusal
Why an ask was refused: a send's refusals, no budget headroom for one request of the member's model, or lead (the ask was addressed to the team's lead, which never answers an operator's ask).
type AskRefusal = "forbidden" | "unknown_member" | "stale_member" | "member_ended" | "self" | "lead" | "mailbox_full" | "team_closed" | "budget_exceeded";