The block-compressor dispatch already selected its strategy and row-mode index
in Rust, but C still classified the match state into no-dictionary,
ext-dictionary, attached-dictionary, or dedicated-dictionary mode. Project the
window and match-state scalars into Rust so that four-way policy is centralized
with compressor dispatch while C retains private match-state access.
Test Plan:
- ulimit -v 41943040; CARGO_BUILD_JOBS=1 cargo check --tests (rust)
- ulimit -v 41943040; CARGO_BUILD_JOBS=1 cargo clippy --tests -- -A clippy::manual-bits -D warnings (rust)
- ulimit -v 41943040; make -j1
- ulimit -v 41943040; make -j1 -C tests test
ddidderr
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