Records the parallel chunk-compression perf change and the doc sweep that
landed after the v2.1.0 tag.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
Fold the Unreleased HNSW / Python 3.14 entries into a single v2.1.0
(2026-06-03) section being cut and tagged now.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>