Move the serial LDM dictionary preload policy into Rust. The C MT adapter now
exposes only the private window and hash-table operations through checked
callbacks, while Rust owns empty/raw-content eligibility, loaded-dictionary
reset ordering, and the force-window publication rule. The explicit projection
keeps the dictionary inputs and callback ABI auditable without exposing the
private SerialState layout.
Test Plan:
- ulimit -v 41943040; CARGO_BUILD_JOBS=1 cargo check --manifest-path rust/Cargo.toml --tests
- ulimit -v 41943040; CARGO_BUILD_JOBS=1 cargo clippy --manifest-path rust/cli/Cargo.toml --all-targets -- -D warnings
- ulimit -v 41943040; CARGO_BUILD_JOBS=1 make -j1
- ulimit -v 41943040; make -j1 -C tests test
ddidderr
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