Result events

[rhysrevans3]

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• Have you followed the guidelines in our Contributing document?
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The purpose of this change is to...

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[sturoscy-personal]

This doesn't look like it's changing too much. Will anything need updating at the transaction api level?

[rhysrevans3]

@sturoscy-personal no only changes will be in the consumer when posting results to the success/error topics.

[lukaszlacinski]

All event streams have six partitions. The event metadata should include both the partition number and the offset.