Redirect Tracking throws error on background thread

[KevinJump]

similar to #6464 the RedirectTrackingComponent code throws errors if a content item is published in a background thread.

https://github.com/umbraco/Umbraco-CMS/blob/v8/dev/src/Umbraco.Web/Routing/RedirectTrackingComponent.cs

Principly here ,
https://github.com/umbraco/Umbraco-CMS/blob/v8/dev/src/Umbraco.Web/Routing/RedirectTrackingComponent.cs#L73

There is no HttpContext (i think) so this errors

in other places in the on the page

// that event is a distributed even that triggers on all nodes
// BUT it should totally NOT run on nodes other that the one that handled the other events
// and besides, it cannot run on a background thread!

Questions:

• is publishing on a background thread ever supported?
• would it be OK to have this fail silently if there is no HttpContext or does it need some no httpContext way of working ?

[KevinJump]

the method outlined in #4572 by @zpqrtbnk #4572 (comment) enables this to work.

you just have to make sure the calling component is wrapping its code in the EnsureUmbracoContext call to get the context.