Deliver response code with context

[crazytaxii]

What type of PR is this?

/kind feature

What this PR does / why we need it:

1. Deliver the response code with context.

2. Reducing the JSON unmarshal expense of audit middleware.

3. Optimized log output:

   {"client_ip":"127.0.0.1","error":"密码错误","latency":"9822113µs","level":"error","method":"POST","msg":"FAIL","request_id":"20240914134932-012927","response_code":401,"time":"2024-09-14T13:49:42.029445472+08:00","uri":"/pixiu/users/login"}
   

Does this PR introduce a user-facing change?

NONE