TeamStartResult
team.start's result.
A union discriminated by status.
started
status"started"required"started": the member exists in state starting; its task is queued.
memberMemberRefrequiredThe new member: its name is <agent>-<k>.
refused
status"refused"required"refused": nothing was done; code says why.
codeStartRefusal | OperatorRefusalrequiredWhy it was refused.
detailInvalidDefinitionPresent exactly when code is invalid_definition: which field, why, and what is allowed.