Function run_config_reload_worker 

pub async fn run_config_reload_worker<N, F, Fut>(
    notifier: Arc<N>,
    config: ConfigReloadWorkerConfig,
    shutdown: CancellationToken,
    reload: F,
) -> Result<()>
where
    N: ConfigChangeNotifier + ?Sized,
    F: FnMut(ConfigReloadMessage) -> Fut,
    Fut: Future<Output = Result<()>>,

Runs a reload subscription loop until shutdown is cancelled.

The loop never carries configuration values over pub/sub. A matching notification only tells this process to reload from its authoritative store. Failed reload hints are coalesced and retried with bounded exponential backoff, even if no further notification arrives. Callbacks must support repeated authoritative reads; an empty key list means reload all config. Shutdown drops in-flight callbacks, which must be safe to cancel and repeat.

The loop uses the transport supervision of run_config_reload_supervisor, but has no authoritative reconcile callback. It retries received hints; repairing notifications lost during disconnection requires the supervisor API with a full reconcile callback.

Errors

Returns [ConfigError] when publishing, subscription, reconciliation, or reload handling fails.