Define more pytest markers

We currently have `pytest.mark.torch` as a pytest marker used to identify tests that depend on PyTorch. This can be used to selectively run only these tests or skip them altogether.

We should define more markers for other cases such as:

- `pytest.mark.ray` for tests that depend on ray.
- `pytest.mark.memcached` for tests that depend on memcached.

在代码库中查找现有的 pytest 标记，例如 `pytest.mark.torch`，以了解其模式。搜索使用 ray 或 memcached 的测试，以确定应在哪里添加新标记。在 pytest 配置中定义这些标记（可能位于 pyproject.toml、setup.cfg 或 conftest.py 中），然后将其应用到相关的测试函数。运行已标记的测试，以验证它们是否正常工作。

由索引模型根据 Issue 内容生成。