Function start_channels 

pub async fn start_channels(
    config: Config,
    canvas_store: Option<CanvasStore>,
    cancel: CancellationToken,
    sop_engine: Option<Arc<Mutex<SopEngine>>>,
    sop_audit: Option<Arc<SopAuditLogger>>,
) -> Result<(), Error>

Start all configured channels and route messages to the agent