Describe the bug
Using a shared richlogger object in the project, calling WithFields to print business logs. In high-frequency operation modules, WithFields continuously appends fields, causing high memory allocation and long GC time, which slows down system execution.

使用公共的 richlogger 对象，在项目中调用 WithFields 打印业务日志，在高频操作模块，WithFields 会不停追加 fields 导致内存分配和gc耗时久，系统执行变慢

To Reproduce
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1. The code is

2. The error is

Expected behavior
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Environments (please complete the following information):

• OS: linux
• go-zero version 1.6.5
• goctl version 1.6.0

More description
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