hydroflow

ci: upload benchmark html as artifacts for viewing in PRs [ci-bench]

feat(hydro_lang): add `flat_map` / `flatten` to `KeyedStream` (#2127)

fix(hydro_lang): ensure that `Stream::scan` actually remembers state with unbounded input (#2126)

chore: pin Rust to 1.89 (#2137)

test(dfir_rs): ensure `surface_demux_enum` actually assert results (#2132)