c265bcbb5e
## Summary Phase #3a, stacked on #2469. Compresses each chunk record independently with libdeflate (random access preserved). Trammel: 124.7 MB → 19.2 MB (−85%). ## Details - Whole-record framing `[u32 UncompressedLen][payload]`; records that don't shrink (tiny Uniform) are stored raw, detected as payload length == UncompressedLen. - Codec chosen by full-Trammel spike: libdeflate VeryHigh (16.5 MB, 1.83 µs/chunk decompress) over zstd L19/22 (17.4 MB) and managed Brotli q11 (16.4 MB) — best native ratio, fastest decompress, already the repo's packet codec (no new dependency). - Reuses cached thread-static bindings: `Deflate.Maximum` for bake, `Deflate.Standard` for reads. - Compression is bake-time only; decompression is one-time per chunk (LRU-cached). - Format v7; v6 files rejected and re-baked once. ## Tests v7 unit tests + the v6 suite run through the compression path; full pathfinding suite green; Release build clean. |
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