Handle Solace Acknowledgements on worker pool instead of event loop thread

[SravanThotakura05]

An intermittent issue is observed where Solace message processing is stuck during OAuth token refresh. The analysis indicated a possible circular wait loop between reconnection and pending acknowledgements. This is causing a deadlock and failure as event loop thread is blocked for more than 2000ms.

As part of this pull request, Solace ack handling is moved to worker pool instead of event loop to prevent the deadlock

[ozangunalp]

Once it is executed on the worker pool it still needs to be emitted on the message context.

So you'd need to add
.emitOn(msg::runOnMessageContext) after runSubscriptionOn.

Otherwise, I think it will resolve the issue described.

[SravanThotakura05]

Once it is executed on the worker pool it still needs to be emitted on the message context.

So you'd need to add .emitOn(msg::runOnMessageContext) after runSubscriptionOn.

Otherwise, I think it will resolve the issue described.

Thanks @ozangunalp for reviewing the change. I have added the suggested change