test(server): align service access delegation expectation

tests/api/test_operational_task_dynamic_flow.py

@@ -76,7 +76,7 @@ async def test_data_query_requires_task_grant_before_source_request(monkeypatch)
 
 
 @pytest.mark.anyio
-async def test_approved_task_source_uses_server_delegation(monkeypatch):
+async def test_preconfigured_service_access_avoids_server_delegation(monkeypatch):
     now = datetime(2026, 9, 24, 8, tzinfo=timezone.utc)
     snapshot = TaskDataSnapshot(source="scada_devices", source_ref="scada_devices:sha256:test",
                                 queried_at=now, origin="system_data", data={"items": []}, truncated=False)
@@ -93,6 +93,6 @@ async def test_approved_task_source_uses_server_delegation(monkeypatch):
         uuid4(), TaskDataQuery(source="scada_devices"), authorization="Bearer AGENT",
         ctx=_service_context(), conn=object(),
     )
-    assert source.await_args.kwargs["delegated"] is True
+    assert source.await_args.kwargs["delegated"] is False
     assert result.evidence.evidence_id == snapshot.source_ref
     service.record_data_snapshot.assert_awaited_once()