[BUG] MCP server plugin requestConfig too long

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Current Behavior

 MCP server plugin requestConfig too long will cause db error

### Expected Behavior

_No response_

### Steps To Reproduce

_No response_

### Environment

```markdown
ShenYu version(s):
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### Debug logs

_No response_

### Anything else?

_No response_