Add just the testing setup from #26. #31

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stb wants to merge 1 commit from testing into main

Author	SHA1	Message	Date
Stefan Bethke	f204ab7f28	Add just the testing setup from #26 . All checks were successful / Verify (pull_request) Successful in 1m12s Details Important: there are changes here to adapt the tests and the Keycloak test realm that are incompatible with the changes in #29. Ultimately, the changes in #29 need to be applied over this.	2026-07-19 10:27:51 +02:00