实现了问卷回溯功能

[Ricardo-M-Shang]

改动内容

Issue

[Ricardo-M-Shang]

问卷版本控制是一个完整的版本管理系统，允许用户：

• 自动保存问卷编辑历史
• 查看所有版本的修改记录
• 对比两个版本之间的差异
• 恢复到任意历史版本
• 为版本添加标签和描述

[codecov]

Codecov Report

❌ Patch coverage is 0% with 181 lines in your changes missing coverage. Please review.
✅ Project coverage is 76.15%. Comparing base (880f7ce) to head (6fcafe6).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...c/modules/survey/services/surveyVersion.service.ts	0.00%	102 Missing ⚠️
...les/survey/controllers/surveyVersion.controller.ts	0.00%	42 Missing ⚠️
server/src/modules/survey/dto/surveyVersion.dto.ts	0.00%	23 Missing ⚠️
server/src/models/surveyVersion.entity.ts	0.00%	14 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #537      +/-   ##
==========================================
- Coverage   79.81%   76.15%   -3.67%     
==========================================
  Files         145      149       +4     
  Lines        3765     3946     +181     
  Branches      489      517      +28     
==========================================
  Hits         3005     3005              
- Misses        732      938     +206     
+ Partials       28        3      -25     

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