feat: release 2.4.0 with original cases and automatic human review

tests/unit/graph/test_exit_settlement.py

@@ -532,7 +532,7 @@ async def test_assert_failure_yields_failed_tests_but_completed_status(tmp_path)
 
     # SDK wrap-up: trace suffix distinguishes assertion failures from _PASS
     assert resolve_trace_suffix("completed", outcome) == "_TESTFAIL"
-    assert resolve_trace_suffix("completed", {"tests": {"failed": 0}}) == "_PASS"
+    assert resolve_trace_suffix("completed", {"tests": {"failed": 0}}) == "_UNVERIFIED"
     assert resolve_trace_suffix("failed", outcome) == "_FAIL"
 
     # And the return structure surfaces the machine-readable summary