Advance workflow stages from the state-driven coordinator

internal/agents/coordinator.go

@@ -72,6 +72,9 @@ func (m *Manager) coordinatePass(ctx context.Context, started map[string]bool) {
 	for _, r := range work.SettleReviews {
 		once(fmt.Sprintf("settle:%s:%d", r.TaskID, r.N), func() { m.settleReviews(r) })
 	}
+	for _, id := range work.AdvanceStages {
+		once("advance:"+id, func() { m.advanceStage(id) })
+	}
 	for _, p := range work.ReadyPrompts {
 		once("ready:"+p.TaskID, func() { m.promptReady(p) })
 	}