fix(plugin): heuristics blocked when ctx_reduce disabled and no pending ops

When ctx_reduce_enabled=false, pending ops are always 0, so the
heuristic gate (hasPendingUserOps && scheduler=execute) never fired.
Tool cleanup and reasoning clearing were completely blocked above the
execute threshold. Removed the pending ops requirement — the scheduler
already gates execute decisions properly.

Author: ualtinok

packages/plugin/src/hooks/magic-context/transform-postprocess-phase.ts

@@ -112,7 +112,7 @@ export function runPostTransformPhase(args: RunPostTransformPhaseArgs): void {
         !compartmentRunning &&
         (isExplicitFlush ||
             forceMaterialization ||
-            (hasPendingUserOps && args.schedulerDecision === "execute" && !alreadyRanThisTurn));
+            (args.schedulerDecision === "execute" && !alreadyRanThisTurn));
     if (shouldRunHeuristics) {
         const reason = isExplicitFlush
             ? "explicit_flush"