Function drive_cmd_init_after_register 

async fn drive_cmd_init_after_register(
    atlas_endpoint: &str,
    before: &HashSet<String>,
    config_json: String,
)

Wait for the new provider (any provider not in before) to appear in atlas with a */driver gRPC capability, then call Driver(CMD_INIT, config_json). One package = one provider. Gives up after 60s; rbnx start keeps the package running regardless.