Update dependencies: rust-htslib 1.0, rand 0.10, rayon 1.11

Bump major versions:
- rust-htslib 0.47 -> 1.0 (Rc->Arc thread safety, no API changes needed)
- rand 0.8 -> 0.10, rand_chacha 0.3 -> 0.10

Bump minor version:
- rayon 1.10 -> 1.11

Fix coitrees 0.4 platform-dependent type: node.metadata is &u32 on
AVX backends but u32 on nosimd. Use Borrow<u32> to handle both.

Author: ewels