test(checkpoint): classify Darwin refusal by requested native profile

Signed-off-by: LoopX Agent <337587101+loopx-agent@users.noreply.github.com>

Author: loopx-agent

benchmark/tests/test_native_checkpoint_handoff.py

@@ -686,7 +686,7 @@ def response(payload, index, message):
             return
         assert len(result["checkpoint_handoffs"]) == 1
         event = result["checkpoint_handoffs"][0]
-        if capture == "native" and sys.platform == "darwin":
+        if json.loads(request.read_text())["native_session"] and sys.platform == "darwin":
             # Unsupported native interruption is refused before any signal;
             # the original tool result is delivered and no abort is fabricated.
             assert not event["captured"] and "not qualified on Darwin" in event["error"]