minikv (v2.0.1)

release: 2.0.1

- README: Operations section (what works, what answers 501, CLI exit codes) and HRW placement
- CHANGELOG: 2.0.1 entry with a correction note on earlier entries
- Docs and runbooks describe what is implemented; repair, compact and rebalance move to 2.2.0 on the roadmap
- Version 2.0.1, package description fixed