feat(KB-648): enable parallel test execution and optimize test performance

- Optimize backup tests using fake timers instead of real timeouts

- Enable parallel file execution in core, engine, CLI, and dashboard packages

- Add inline test helpers to reduce dependencies in dashboard routes tests

- Update executor tests with exact command matching and improved assertions

- Update AGENTS.md with test optimization patterns (fake timers, unique temp dirs)

packages/engine/src/pr-comment-handler.ts

@@ -85,10 +85,10 @@ export class PrCommentHandler {
     const text = this.buildSteeringText(prInfo, comment, hasCodeSuggestions);
 
     try {
-      await this.store.addComment(taskId, text, "agent");
-      prMonitorLog.log(`Added comment for PR review #${comment.id}`);
+      await this.store.addSteeringComment(taskId, text, "agent");
+      prMonitorLog.log(`Added steering comment for PR review #${comment.id}`);
     } catch (err) {
-      prMonitorLog.error(`Failed to add comment for ${taskId}:`, err);
+      prMonitorLog.error(`Failed to add steering comment for ${taskId}:`, err);
     }
   }