v0.4.1

API

• Add opt-in f32-storage SIMD indexes for compact coordinate storage.
• Add exact range and KNN callbacks for f32-storage indexes using
  caller-owned f64 boxes.

Binary Format

• Document the packed spatial index binary format.
• Add distinct f32 box layout flags for f32-storage indexes.

WASM

• Add the interactive WASM demo for 2D and 3D searches.
• Add 3D depth slicing, depth coloring, and an interactive depth legend.
• Tighten demo controls, query overlays, status bar, and wrapper helpers.

Benchmarks

• Add f32-vs-f64 storage benchmarks for range queries and KNN.

Documentation

• Document f32 storage trade-offs, exact query APIs, and benchmark guidance.

Examples

• Add an f32 exact-query example.

Tests

• Add f32 storage coverage for range search, exact range search, KNN,
  persistence, and views.
• Add proptest search and persistence robustness checks
• Rustfmt proptest files