Fix acknowledgement timeout handling in DefaultAcknowledgementSet

[san81]

When acknowledgements time out in DefaultAcknowledgementSet, the callback is never invoked. The current implementation cancels the callback future on timeout but doesn't execute it, making caller unaware of expire event and giving the caller an option to take their required action.

The fix in this PR is to call the callback handler with false when acknowledgement set expires, which is kind of same as negative acknowledgment.

1. Added callbackInvoked flag to prevent double invocation
2. Modified isDone() method to invoke callback with false on timeout
3. Updated complete() and release() methods to set the flag when invoking callback

The fix ensures that when an acknowledgement set times out, the callback is explicitly invoked with false

Check List

• New functionality includes testing.
• New functionality has a documentation issue. Please link to it in this PR.
  • New functionality has javadoc added
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[san81]

Unused method