Prerelease that has the most important paths and tech implemented with happy paths and naively.

Meant as Proof of Concept for technical directions. And as basis to implement other similar features. And as starting point to finish details later on.

Not (at all) feature complete, just that all important tech is in there, even if implemented only on one simple component. E.g. we don't need all attributes and updates to federate: even if only, say bio updates are federated, and nothing else that is fine