feat: add quality-review dispatch hook to intercept agent:stopped events

When an execute-mode agent stops with task_complete and the initiative has
qualityReview=true, the orchestrator now spawns a fresh execute-mode agent
to run /simplify on changed .ts/.tsx/.js files before marking the task
completed. The task transitions through quality_review status as a recursion
guard so the review agent's stop event is handled normally.

- Add apps/server/execution/quality-review.ts with three exported functions:
  computeQualifyingFiles, shouldRunQualityReview, runQualityReview
- Add apps/server/execution/quality-review.test.ts (28 tests)
- Update ExecutionOrchestrator to accept agentManager, replace
  handleAgentStopped with quality-review-aware logic, add getRepoPathForTask
- Update orchestrator.test.ts with 3 quality-review integration tests
- Update container.ts to pass agentManager to ExecutionOrchestrator
- Update docs/dispatch-events.md to reflect new agent:stopped behavior

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/server/container.ts

@@ -250,6 +250,7 @@ export async function createContainer(options?: ContainerOptions): Promise<Conta
     conflictResolutionService,
     eventBus,
     workspaceRoot,
+    agentManager,
     repos.agentRepository,
   );
   executionOrchestrator.start();