zccache 1.12.3

Local-first compiler cache for C/C++/Rust/Emscripten
Documentation 
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## fingerprint/

Per-file mtime → blake3 fingerprint cache (`TwoLayerCache`) and aggregate
file-set hash (`HashCache`). Used by the `zccache-fp` bin and the
`zccache.fingerprint` Python wrapper. See `mod.rs` for the public API.