"code": 500,"message": "Internal Server Error"

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior


### Expected Behavior


### Steps To Reproduce

_No response_

### Environment

```markdown
ShenYu version(s):2.5.1
```

### Debug logs

_No response_

### Anything else?

I hope that when the gateway request times out, it will return specific times out messages to the requesting system instead of returning 500,Internal Server Error

No source file, test, or reproducible steps are provided. Start by reproducing the gateway timeout on ShenYu 2.5.1, then trace the request's timeout handling and compare the observed 500 response with the expected behavior shown in the issue images. Done means a timeout returns a specific timeout message instead of Internal Server Error.

Written by the indexing model from the issue text.