[Feature] API Versioning

[devtobi]

Relevant component

refarch-integrations, refarch-gateway

Problem description (optional)

Currently our artifacts do not use versioned APIs. This is bad for clients, as they will break once the API on our side changes.

Desired solution

We should investigate Spring API versioning (https://docs.spring.io/spring-framework/reference/web/webmvc-versioning.html) and discuss whether this is relevant for us or not.

Considered alternatives (optional)

No response

Additional context (optional)

No response

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