Align with spec #3002: optional clientInfo, serverInfo in result _meta (#3143)

tests/docs_src/test_client_transports.py

@@ -22,6 +22,7 @@ async def test_the_in_memory_program_on_the_page_runs(capsys: pytest.CaptureFixt
 async def test_in_memory_client_talks_to_the_server_object() -> None:
     """tutorial001: passing the server object connects in-process. No subprocess, no port."""
     async with Client(tutorial001.mcp) as client:
+        assert client.server_info is not None
         assert client.server_info.name == "Bookshop"
         assert client.protocol_version == "2026-07-28"
         result = await client.call_tool("search_books", {"query": "dune"})