Function execute_go_ralph 

pub async fn execute_go_ralph(
    task: &str,
    okr: &mut Okr,
    okr_run: &mut OkrRun,
    provider: Arc<dyn Provider>,
    model: &str,
    max_iterations: usize,
    bus: Option<Arc<AgentBus>>,
    max_concurrent_stories: usize,
    registry: Option<Arc<ProviderRegistry>>,
) -> Result<GoRalphResult>

Run Ralph loop for a /go task, mapping results back to OKR.