It has originated from the project of mine called eventdb. It's huge problem was that it was too focused on a very specific set of features, didn't support any exteranl data storages and was pain in the ahh to maintain.
Later on I switched to using Grafana+Loki, which required to reimplement log stream splitting/routing/auth as a separate service. There were quite a lot of versions, and I have ultimately decided to make the theird version of this public.