Function call_driver_cmd 

async fn call_driver_cmd(
    atlas: &mut AtlasClient,
    provider_id: &str,
    driver_contract: &str,
    component: &str,
    pkg_label: &str,
    cmd: u32,
    config_json: String,
) -> Result<String>

Issue one Driver(cmd) RPC against a freshly-connected channel, then release the channel. Returns the response’s state string on success; bail-errors when ok=false or the RPC itself fails. Used by the boot path for both CMD_INIT and CMD_ACTIVATE, with identical timeout / channel hygiene.