Module engine 

Structs

EngineStats

Summary statistics about the loaded engine state.

RoutingSpec

Everything needed to (re)build a SchemaRouter on rule load. Pipeline sets are pre-resolved by the caller (builtin names + files), index-aligned with plan.pipeline_sets().

RuntimeEngine

Wraps a CorrelationEngine (or a plain Engine) and provides the interface the runtime needs: process events, reload rules, and query state.