ClickHouse OR PostgreSQL support
At the moment only in-process DBs, SQLite and DuckDB, are supported. This makes testing easy and allows for easy sharing of metric data. However, in a distributed system, that relies on, e.g., NFS, both of those may be a bad fit. For these scenarios support for a DBMS, like ClickHouse or PostgreSQL, should be provided in order to accommodate large workloads.
It would also be nice to support the migration between DBs (PostgreSQL