The first milestone - switching to use key/value abstraction, implement it over PostgreSQL and use it as part of multipart tracking is already part of the latest release. As we develop each milestone, changes will be going into our main branch of development and part of each release. The changes are not enabled by default as we still in development phase and not feature complete. While we develop this capability, enabling can be done by settings 'database.enable_kv: true' and 'database.type: postgres'. Migrate will be enforced and there is no way to migrate back. Enabling this feature is experimental and should not use in production, only for development and experimentation.