修复随机数某些平台生成重复数字

[lightbrotherV]

PR Category

Execute Infrastructure

PR Types

Bug fixes

Description

GetRandomId() 函数每次调用时都会重新初始化随机数生成器 (std::random_device 和 std::mt19937_64)，这会导致生成的随机数可能重复或不够随机。

1. std::random_device 被重复初始化：
   每次调用函数时都新建 random_device 和 mt19937_64，可能导致种子相似（尤其在某些平台上 random_device 实现不够完善）。

2. 伪随机数引擎未复用：
   mt19937_64 的状态在每次函数调用时重置，失去了伪随机序列的长期统计特性

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[lightbrotherV]

fix random num same

[codecov-commenter]

Codecov Report

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Additional details and impacted files

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[lixinqi]

fix random num same

thanks

[luotao1]

hi, @lightbrotherV

• 非常感谢你对飞桨的贡献，我们正在运营一个PFCC组织。PFCC是飞桨开源的贡献者俱乐部，只有给飞桨合入过代码的开发者才能加入，俱乐部里每两周会有一次例会（按兴趣参加），也会时不时办线下meetup面基，详情可见 https://github.com/luotao1 主页说明。
• 如果你对PFCC有兴趣，请发送邮件至 [email protected]，我们会邀请你加入~