Implement message queue

[secustor]

Fixes #429

Changes

• [x] add Kafka to docker-compose
• [x] add Kafka producer to checkoutservice
• [x] implement Accountingservice
• [x] implement Frauddetectionservice

For significant contributions please make sure you have completed the following items:

• [x] Appropriate CHANGELOG.md updated for non-trivial changes
• [x] Design discussion issue #429

[cartersocha]

Hey just an fyi we're on a feature freeze for the next week or 2 due to our upcoming v1 release and kubecon.

Feel free to keep this open and working on it tho!

[fatsheep9146]

I wonder that why add two new services? Since the checkout service is the only kafka message producer, the two new services are both consumers. What's the point of this?

[secustor]

Async workflows usually have multiple consumers with different use cases.
The intention is to show async with OTEL in a common scenario and that both spans are added to the parent span of the checkoutservice

[github-actions[bot]]

This PR was marked stale due to lack of activity. It will be closed in 7 days.