CreateInvitationRequest

Request body for POST /api/teams/{id}/invite.

role may be anything up to the inviter's own rank on the team — an owner can invite at
owner — and on the gating team or temper-system only a system admin invites (the team-role
rank rule, C16/R10).

{
    "invited_email": "string",
    "role": "owner"
}