Support for non-base64 encoded bodies

[danielmarbach]

Describe the feature.

Is your feature related to a problem? Please describe.

Describe the requested feature

The transport encodes by default the bodies into base64 which does come with a considerable overhead. Given the message size restrictions on ASQ having the possibility to no longer base64 encode messages (similar to what we did with SQS) could free up significant room in regard to what size of payloads can be transmitted.

Describe alternatives you've considered

Additional Context

No response

[boblangley]

We have started working on this feature. We will update the status as work progresses.