Module scheduler 

Page-rewrite scheduler.

schedule_rewrites runs Kahn’s algorithm over the declared PageRewrite::reads / writes axes to produce a deterministic topological order — a rewrite that writes category X runs before any rewrite that reads X. Cycles and unannotated Custom rewrites abort construction with EngineConstructionError.

This runs once at [Engine::new] and its output is cached on the engine instance; per-document rewrite evaluation walks the pre-computed order without re-sorting.

Functions

schedule_rewrites

Compute the topological order of rewrites by their reads / writes axes.