Function run_memory_evolution 

pub async fn run_memory_evolution(
    engine: &Arc<Mutex<MemgineEngine>>,
    dry_run: bool,
) -> Result<EvolutionOutcome, String>

The Memory arm of the evolution executor: size the pass with decide_maintenance (localized vs global — recorded, since consolidate() is the single live mechanism for both today) and run engine.consolidate(). dry_run skips the consolidate and reports what would run (applied == false).