Open a memiavl database at a historical version

Open a memiavl database at a historical version: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). The embedded memiavl database (the memiavl Go module in this repository) can currently only be opened at its latest committed version: loading the database replays the…

The task

The embedded `memiavl` database (the `memiavl` Go module in this repository) can currently only be opened at its latest committed version: loading the database replays the entire write-ahead log, so you always end up at the tip.

Part of FineEnvs/MiMo-V2.6-RL-harbor-code.