Function call_driver_init 

async fn call_driver_init(
    atlas: &mut AtlasClient,
    provider_id: &str,
    driver_contract: &str,
    config_json: String,
) -> Result<String>

Send Driver(CMD_INIT, config_json) to a known provider’s */driver gRPC capability. Mirrors deploy.rs’s call_driver_cmd but inlined to keep run_package.rs free of cross-module coupling.