Include the retry count in the MethodRetryEvent

[jan-olaveide]

It would be useful for logging and metrics purposes to have the retry count available in the MethodRetryEvent.

Also, it would be useful to know at which attempt a retry actually succeeded, possibly through a RetrySuccessfulEvent.

Any chance of including this in future releases?

[jan-olaveide]

I noticed that when a method annotated with @ Retryable throws an exception that should not be retried, this actually triggers two events. The failure attribute of the first event is the non-retryable exception, the second is a RetryException with the original exception as cause. Is this intentional? I would naively have expected only a single event (the last one), with the aborted flag set. Not sure what the retry count should be for the events in this case, given that this is intended behaviour.