Allow pause step between CoE attempt 1 and attempt 2

Update test_no_job_tolerates_failure to permit an optional pause step
between a continue-on-error attempt 1 and its corresponding attempt 2.
This allows the Setup Ruby retry pattern to include a 60-second pause
before the second attempt without breaking the CI contract test.

Author: cursoragent

scripts/tests/test_merge_queue_fail_fast.py

@@ -131,7 +131,12 @@ def test_no_job_tolerates_failure(self):
                 continue
             self.assertRegex(step, r"^name: .* \(attempt 1\)\n", step[:80])
             sid = re.search(r"(?m)^        id: (\S+)$", step).group(1)
-            retry = steps[i + 1]
+            # Allow an optional pause step before attempt 2.
+            next_step = steps[i + 1]
+            if re.search(r"^name: .* \(pause before attempt 2\)\n", next_step):
+                retry = steps[i + 2]
+            else:
+                retry = next_step
             self.assertRegex(retry, r"^name: .* \(attempt 2\)\n", retry[:80])
             self.assertIn(f"steps.{sid}.outcome != 'success'", retry, retry[:80])
             self.assertEqual(