weavatrix-scan 0.4.0

Adds the complete reusable SelectionMatcher policy, lossless matcher normalization, and optional existing or dedicated Rayon pool integration with cancellable busy-timeout admission. Refreshes output-equivalent competitor benchmark medians and documents the 0.4 API. Validated on Ubuntu, Windows, macOS, MSRV 1.88, clippy, rustdoc, parity, fuzz, and package gates.