Real-time timeout features

Welcome to this new Azure Service.

The doc is talking about REAL-TIME messaging application.
Could you please add precisions about how it is hard or soft real time as well as how to setup timers/timeout for realtime delivery ?

For instance:
`Publish(message, min_timeout, max_timeout)`
where `min_timeout` guaranty to deliver the message after `min_timeout` seconds and where `max_timeout` will guaranty to deliver the message before `max_send_timeout` seconds.

I may have missed something in the doc, sorry if that's the case (any pointer is welcome).

Olivier

Start with the repository's real-time messaging documentation and identify how delivery timing and timeout configuration are currently described. Verify whether the Azure Web PubSub publish API supports the proposed minimum and maximum timeout behavior, and document the hard or soft real-time guarantees and timer setup if confirmed. Done means the relevant documentation answers these questions or points readers to the correct existing guidance.

Written by the indexing model from the issue text.