IHost Wait For Start Async(CancellationToken) Lifetime.
Wait For Start Async(CancellationToken)
Called at the start of StartAsync(CancellationToken) which will wait until it's complete before continuing. This can be used to delay startup until signaled by an external event.
public System.Threading.Tasks.Task WaitForStartAsync (System.Threading.CancellationToken cancellationToken);
abstract member WaitForStartAsync : System.Threading.CancellationToken -> System.Threading.Tasks.Task