在带IO（Netty）的场景下，基于本项目有没有什么好的办法能做到跨线程传递对象？

其实问题比较简单，就是 像这样的异步调用是否有
除了用`TtlRunnable/TtlWrappers`修饰回调以外的方法，在回调和外部传递类似`MDC`的参数？

```mermaid
sequenceDiagram
participant u as Controller
participant c as CompletionStage
participant n as netty-framework
participant r as remote

Note over u: 这里有一个上下文对象Context
u->>+n: query
n-->>+r: network
n->>-c: CompletionStage
r-->>-n: network
n-->>c: complete
c-->>u: thenXxxx
Note over u: 这里需要访问上面的Context
```

Start by reading the project's TtlRunnable and TtlWrappers entry points, then trace how a CompletionStage callback and Netty execution cross thread boundaries. The issue does not name files or tests and does not define an acceptance criterion; done would require an agreed design and corresponding validation for carrying Context-like values without manually wrapping callbacks.

Written by the indexing model from the issue text.