fix: admit generated drift workflow test in QPK pin gate

Co-Authored-By: Codex <noreply@openai.com>

Author: Pigbibi

scripts/merge_verified_strategy_qpk_pin_prs.py

@@ -33,6 +33,7 @@
         "pyproject.toml",
         "qsl.toml",
         "tests/test_qsl_compat_metadata.py",
+        "tests/test_drift_workflow_config.py",
         "uv.lock",
         ".github/workflows/drift-check.yml",
     }

tests/test_merge_verified_strategy_qpk_pin_prs.py

@@ -57,6 +57,12 @@ def test_strategy_pin_pr_fails_closed_for_unexpected_changes_or_ci() -> None:
         pyproject_text=_pyproject(),
         qpk_sha=TARGET,
     ) == "unexpected_changed_files"
+    assert candidate_reason(
+        pr=_pr(),
+        changed_files=[*sorted(ALLOWED_CHANGED_FILES), "src/unrelated_runtime_change.py"],
+        pyproject_text=_pyproject(),
+        qpk_sha=TARGET,
+    ) == "unexpected_changed_files"
     assert candidate_reason(
         pr=_pr(checks=[{"status": "IN_PROGRESS", "conclusion": ""}]),
         changed_files=sorted(ALLOWED_CHANGED_FILES),