xpile-ruchy-codegen 0.1.0

Ruchy backend stub — lowers meta-HIR to Ruchy source. The Profile::RuchyOut path reconstructs the pipeline operator at emission. Phase 4.
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Ruchy backend.

Lowers meta-HIR to Ruchy source. v0.1.0 emits the same arithmetic subset as xpile-rust-codegen — the surface difference is fun ... -> T { ... } instead of Rust's pub fn ... -> T { ... }, and floor-div / modulo still go through Euclidean semantics (div_euclid / rem_euclid).

Future scope (tracked by Profile::RuchyOut): reconstruct the pipeline operator |> and DataFrame-flavored sugar from meta-HIR patterns. See docs/specifications/sub/bidirectional-ruchy.md.