Invite Seller Member

curl -X POST 'http://localhost:9000/vendor/sellers/sel_01HXYZ/members' \
  -H 'Authorization: Bearer <token>' \
  -H 'x-seller-id: <seller_id>' \
  -H 'Content-Type: application/json' \
  -d '{"email": "teammate@acme.com", "role_id": "role_seller_order_management"}'

const { member_invite } = await client.vendor.sellers.$id.members.mutate({
  $id: "sel_01HXYZ",
  email: "teammate@acme.com",
  role_id: "role_seller_order_management",
})

{
  "member_invite": {
    "id": "meminv_01HXYZ",
    "email": "teammate@acme.com",
    "role_id": "role_seller_order_management",
    "accepted": false,
    "expires_at": "2026-01-22T10:00:00.000Z"
  }
}