fix: 修复参数管理中使用参数键查询错误问题

[WangHongshuo]

问题描述：

【超级管理员】-【参数管理】中使用【参数键】作为查询条件报错：

Error 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'key LIKE ? AND `sys_params`.`deleted_at` IS NULL' at line 1

运行环境：
win11
mysql 8.4.6

修复方案：
server/service/system/sys_params.go:62
查询条件中的字符串key用反引号包裹

[Copilot]

Pull request overview

This PR fixes a SQL syntax error that occurred when querying parameters by their key field in the parameter management feature. The error was caused by MySQL treating "key" as a reserved keyword.

Changes:

• Fixed SQL syntax error by escaping the reserved keyword "key" with backticks in the WHERE clause

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[Copilot]

The fix for the reserved keyword issue is correct, but this functionality lacks test coverage. Consider adding tests for the GetSysParamsInfoList function, especially for the Key filter condition, to prevent similar issues in the future. Other services in this directory like auto_code_package and auto_code_template have corresponding test files.