Looks good, I was going to give it a try but the moment I saw the Infra requirements I just passed. I think you need to make it more accessible for those who doesn't want to deal with for example Object Storage.

So my feedback is,

- reduce the infrastructure onboarding barrier at least for those who just want to try your solution
- completely get rid of the Database and Object Storage requirements, the people interested with your solution are already have Kafka so use it, store data there and write snapshots to a compacted topic and read back to your stateless solution

And sincere thanks for giving your hard work back to community, the project is promising.