test(release-gate): assert queue-aware agent-run status parsing

Update release script regression test to match the drain helper that selects the JSON block containing queue.

Co-authored-by: Cursor <cursoragent@cursor.com>

release-gate/release-script.test.mjs

@@ -55,7 +55,7 @@ test('production stable release verifies canary promotion evidence before gate c
   assert.ok(impactIndex > 0, 'missing risk-based impact gate fallback');
   assert.doesNotMatch(source, /在同一候选完成 103 灰度验收且晋升证据校验落地前，禁止非 dry-run/);
   assert.match(source, /read_agent_run_status_json/);
-  assert.match(source, /sed -n '\/\^\{/);
+  assert.match(source, /obj\.queue/);
   assert.match(source, /for _ in \$\(seq 1 120\)/);
 });