Panache next doc cleanup

[FroMage]

Removed javadoc from middle interfaces in favour of top interfaces, added missing @Override, removed missind javadoc @See and fixed the location of upsert operation to the top operations interface.

[quarkus-bot]

Status for workflow Quarkus CI

This is the status report for running Quarkus CI on commit ece6cfa.

✅ The latest workflow run for the pull request has completed successfully.

It should be safe to merge provided you have a look at the other checks in the summary.

You can consult the Develocity build scans.

[FroMage]

Thanks.