Dependency graph construction for [sdivi-rust](https://github.com/geoffgodwin/sdivi-rust).
Builds a `petgraph`-backed `DependencyGraph` from parsed `FeatureRecord`s (pipeline path)
or from a `DependencyGraphInput` struct (pure-compute / WASM path).
Part of the `sdivi-rust` workspace. See the [workspace README](../../README.md) for full documentation.