setting-up-arcade-scope

Handle the one-time mandatory pause where Arcade asks the user to pick their org, project, and (if curated gateways exist) gateway, and the explicit Arcade_Project flow for changing that choice later. Use the first time any hub tool call for an account returns a select_gateway or no_gateways status, or when the user explicitly asks to change their org, project, or gateway. Not for running tasks — scope is otherwise automatic and invisible.