Compression information at consume time

[Vince-Chenal]

Description

Hello,

This ticket is more of a question or a request for advice.

I'm using sarama within a monitoring tool which consumes topics to extract metadata.

In order to monitor topics compression in a "non-intrusive" or "blackbox" way (without customizing dozens of kafka producers deployed in the company), it would be nice to have access to compression information at consume time for example in the ConsumerMessage struct.

I was able to build a version with this modification but I guess this information is hidden on purpose. Am I missing something? What's your opinion on this usecase?

Thanks

Additional context