Function run_concurrently 

pub async fn run_concurrently<HF, MF, HE, ME>(
    http_future: HF,
    mcp_future: MF,
) -> Result<()>
where
    HF: Future<Output = Result<(), HE>> + Send,
    MF: Future<Output = Result<(), ME>> + Send,
    HE: Error + Send + Sync + 'static,
    ME: Error + Send + Sync + 'static,

Run two independent futures concurrently (HTTP + MCP).