Function cmd_agent_spawn 

pub async fn cmd_agent_spawn(
    room_id: &str,
    token: &str,
    username: &str,
    model: Option<&str>,
    issue: Option<&str>,
    personality: Option<&str>,
    socket: Option<&Path>,
) -> Result<()>

One-shot room agent spawn — spawn a ralph agent in the room.