docs(changelog): record the Raincloud-driven file-size work - #314
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The nyc-311 slug from the Raincloud conformance corpus (#205) drove a chain of writer size fixes that took vortex-java from 1.62x to 0.93x of vortex-jni on that file. Document the user-facing changes in [Unreleased]: ALP-RD in the cascade, default chunk-size and retained-budget changes, and the FSST/dict bitpacking and global-dict compression wins. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Fills the empty
[Unreleased]CHANGELOG section for the real-world file-size work merged since 0.12.4, framed as what it was: gaps surfaced by importing the Raincloudnyc-311slug and diffing its layout tree against thevortex-jnireference. That effort tookvortex-javafrom 2854 MB (1.62×) to 1644 MB (0.93× — smaller than the Rust reference) on that file.Entries (terse, house style) cover: ALP-RD in the cascade (#307/#308), default chunk size 131072→65536 and retained budget 1→2 GB, and the FSST/dict-code bitpacking + global-dict values-pool compression + raised Utf8 cap.
Docs-only.
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