vb 0.2.7

## VByte Encoding Benchmark

Comparing varint encoding libraries with 10,000 integers (mixed distribution: 60% small, 30% medium, 10% large).

### Results

| Library | Encode (M/s) | Decode (M/s) |
|---------|--------------|--------------|
| vb | 430.5 | 414.9 |
| integer-encoding | 176.2 | 348.6 |
| leb128 | 289.2 | 212.9 |

### Environment

macOS 26.1 (arm64) · Apple M2 Max · 12 cores · 64.0GB · rustc 1.94.0-nightly (21ff67df1 2025-12-15)