- HVG-aware PCA materialise: OOM PCA ~2.8x faster (39s->14s @50k), bit-identical.
- Vendored anndata-rs in-tree; Windows x86_64 support (threadsafe gated off for
  static HDF5). CI green on Linux/macOS(arm64)/Windows x py3.10,3.12.

See CHANGELOG.md.