feat(compress): move sequence-store policy into Rust
Move sequence-store construction, small-block handling, repcode setup,
last-literal storage, block-body no-compress transitions, target/split
post-build policy, and public sequence conversion into Rust projections.
Keep matchfinders, LDM, external sequence producers, workspaces, and private
compression context state behind narrow C callbacks and preserve the existing
C-facing sequence API.
Test Plan:
- ulimit -v 41943040; make -B -C lib -j1 lib (passed)
- ulimit -v 41943040; make -B -C tests -j1 test-zstd (passed)
- ulimit -v 41943040; FUZZERTEST=-T5s make -B -C tests -j1 test-fuzzer (284 passed)
- ulimit -v 41943040; ZSTREAM_TESTTIME=-T2s make -B -C tests -j1 test-zstream (210 passed)
- ulimit -v 41943040; DECODECORPUS_TESTTIME=-T10 make -B -C tests -j1 test-decodecorpus (1608 passed)
- ulimit -v 41943040; CARGO_BUILD_JOBS=1 cargo test --manifest-path rust/Cargo.toml --no-default-features --features compression,decompression,dict-builder,legacy-v01,legacy-v02,legacy-v03,legacy-v04,legacy-v05,legacy-v06,legacy-v07 --all-targets -- --test-threads=1 (562 passed)
ddidderr
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