Fix patient name lookup from payload

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: steventux

src/relay_listener.py

@@ -102,7 +102,22 @@ def process_action(self, payload: dict):
             return CreateWorklistItem(self.storage).call(payload)
         elif action_name == "worklist.create_test_item":
             result = CreateWorklistItem(self.storage).call(payload)
-            self.process_with_modality_emulator(patient_name=payload.get("patient_name"))
+            patient_name = payload.get("parameters", {}).get("worklist_item", {}).get("participant", {}).get("name")
+
+            def _run_emulator():
+                try:
+                    self.process_with_modality_emulator(patient_name=patient_name)
+                except Exception:
+                    logger.exception("Modality emulator processing failed")
+
+            try:
+                loop = asyncio.get_running_loop()
+            except RuntimeError:
+                # Called outside an event loop (e.g. unit tests)
+                _run_emulator()
+            else:
+                loop.create_task(asyncio.to_thread(_run_emulator))
+
             return result
         elif action_name == "worklist.update_status":
             return UpdateWorklistItemStatus(self.storage).call(payload)

tests/test_relay_listener.py

@@ -124,7 +124,9 @@ def test_process_create_test_item_action_triggers_modality_emulator(self, storag
             response = subject.process_action(payload)
 
         assert response == {"action_id": "action-12345", "status": "created"}
-        mock_emulator.assert_called_once_with(patient_name=payload.get("patient_name"))
+        mock_emulator.assert_called_once_with(
+            patient_name=payload["parameters"]["worklist_item"]["participant"]["name"]
+        )
 
         storage_instance.store_worklist_item.assert_called_once_with(
             WorklistItem(