rpcinfo.GetRPCInfo获取的rpc_info非线程安全

Describe the bug

代码底层使用了pool ，但是rpcinfo.GetRpcInfo()拿到了引用，如果在A方法异步去做。可能会被recycle拿到了空的属性，或者拿到B方法的属性(可能被此时的B方法从pool里取出并赋值) 这个feature有点坑啊。。。 如果非线程安全，那不要暴露出来。。或者COW

To Reproduce

Minimal code or configuration to reproduce the issue:

// paste your code here

Steps:

1. ...
2. ...

Expected behavior

A clear and concise description of what you expected to happen.

Actual behavior

What actually happened. Include error messages, logs, or panic stack traces if available.

// paste error output or logs here

Environment:

• Kitex version: (e.g. v0.12.1)
• Protocol: (Thrift / Protobuf / gRPC)
• Transport: (TTHeader / HTTP2 / Framed / ...)

// paste the output of `go env` here

Additional context

Any other context such as IDL definitions, network topology, proxy/mesh setup, or service governance configuration (retry, circuit breaker, load balancer, etc.).