Add Events-Storage-Area

[opdt]

Implement events with cassandra-storage. As we don't use Keycloak-authorization ourselves, we would be happy to get help with this.

[xgp]

Happy to take this one. I have a start on this https://github.com/opdt/keycloak-cassandra-extension/compare/main...xgp:keycloak-cassandra-extension:xgp/event-store?expand=1

I'm currently working through a few issues with loading the stored events into the Admin UI, but all of the storage methods are working properly.

Let me know what you expect in terms of tests for a PR you would accept.

[opdt]

Let me know what you expect in terms of tests for a PR you would accept.

Our strategy so far was to copy model-layer tests from Keycloak and use them to validate our storage-implementation.

[xgp]

Thanks. I ported the tests from Keycloak. I submitted a DRAFT PR with some outstanding issues. Would love some feedback when you have the time. #124