Feat/optimize task prompt pilot

[tpfz]

What type of PR is this?

Check the PR title.

• This PR title match the format: [<type>][<scope>]: <description>. For example: [fix][backend] flaky fix
• The description of this PR title is user-oriented and clear enough for others to understand.
• Add documentation if the current PR requires user awareness at the usage level.
• This PR is written in English. PRs not in English will not be reviewed.

(Optional) Translate the PR title into Chinese.

(Optional) More detailed description for this PR(en: English/zh: Chinese).

en:
zh(optional):

(Optional) Which issue(s) this PR fixes:

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

❌ Patch coverage is 88.09524% with 10 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...ion/domain/service/evaluator_source_prompt_impl.go	90.00%	4 Missing and 2 partials ⚠️
backend/infra/external/benefit/noop.go	0.00%	4 Missing ⚠️

@@            Coverage Diff             @@
##             main     #188      +/-   ##
==========================================
+ Coverage   58.81%   61.57%   +2.75%     
==========================================
  Files         512      470      -42     
  Lines       53303    50004    -3299     
==========================================
- Hits        31352    30791     -561     
+ Misses      19570    16943    -2627     
+ Partials     2381     2270     -111     

Flag	Coverage Δ
unittests	61.57% <88.09%> (+2.75%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
backend/infra/external/benefit/benifit.go	40.00% <ø> (ø)
backend/modules/evaluation/domain/entity/param.go	58.06% <ø> (ø)
...odules/evaluation/domain/service/evaluator_impl.go	78.28% <100.00%> (ø)
backend/modules/prompt/application/execute.go	83.68% <100.00%> (ø)
backend/modules/prompt/domain/service/execute.go	66.85% <100.00%> (+0.76%)	⬆️
backend/infra/external/benefit/noop.go	0.00% <0.00%> (ø)
...ion/domain/service/evaluator_source_prompt_impl.go	70.49% <90.00%> (+1.26%)	⬆️

... and 50 files with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3e9567c...17244d2. Read the comment docs.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[CozeLoop]

代码审查总结

我已完成对PR #188的专家级代码审查。本次审查发现了多个需要修复的问题，包括：

🚫 必须修复的问题 (3个)

1. JSON反序列化参数错误 - sonic.UnmarshalString 缺少指针参数
2. ResponseFormat逻辑错误 - 可能导致空指针风险
3. JSON标签破坏性变更 - 可能影响向后兼容性

🚨 应该修复的问题 (3个)

1. 测试用例命名与逻辑不一致 - 测试代码中变量命名混淆
2. 测试断言逻辑错误 - expectedTracing 与 DisableTracing 概念相反
3. 业务逻辑变更缺乏说明 - SingleStep 变更缺乏充分验证

💡 建议改进 (1个)

1. 测试验证逻辑不够明确 - 测试用例缺乏明确的验证逻辑

总体而言，DisableTracing 功能的实现思路是正确的，但在实现细节和测试方面需要进一步完善。请优先修复标记为"必须修复"的问题。