Function run_in_container_inner 

async fn run_in_container_inner(
    image_name: &str,
    run_cmd: &str,
    source: &str,
    ext: &str,
    limits: ResourceLimits,
    cache_volume: Option<&CacheVolume>,
    cleanup_signal: Option<Sender<bool>>,
) -> Result<(Option<i64>, String, String, bool), Error>