fix(tests): assert server_info is not None before .name access

pyright's pre-commit hook flagged reportOptionalMemberAccess on
client.server_info.name in two new protocol_version_override tests.
server_info is Implementation | None; every other call site in this
file already asserts not-None first.

Author: STiFLeR7

tests/client/test_client.py

@@ -134,6 +134,7 @@ async def test_client_custom_protocol_version(app: MCPServer):
     """Test that the client negotiates a custom protocol version when configured."""
     async with Client(app, mode="legacy", protocol_version_override="2024-11-05") as client:
         assert client.protocol_version == "2024-11-05"
+        assert client.server_info is not None
         assert client.server_info.name == "test"
 
 

tests/interaction/lowlevel/test_client_connect.py

@@ -199,6 +199,7 @@ async def test_auto_mode_with_a_protocol_version_override_skips_discover_and_ini
             ) as client,
         ):
             assert client.protocol_version == "2024-11-05"
+            assert client.server_info is not None
             assert client.server_info.name == "discoverable"
 
     bodies = [json.loads(r.content)["method"] for r in requests if r.method == "POST"]