Feature request: make `ClientSessionChannel._publishTimeoutHint` adjustable

[stioe]

Currently ClientSessionChannel._publishTimeoutHint is a constant:

private const uint _publishTimeoutHint = 10 * 60 * 1000; // 10 minutes

_publishTimeoutHint is used to determine the timespan to report an error for OPC-subscriptions:

var token = session.Subscribe(
pr => { // good case },
pr => { // error case - takes 10min until is called });

In our use case this 10min timeout is far to long and it would be great if this timeout can be set somehow from the codebase that utilizes this package.