enhance: add trace for search pipeline(#47731)

[MrPresent-Han]

related: #47731

[sre-ci-robot]

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[codecov]

Codecov Report

❌ Patch coverage is 56.27706% with 101 lines in your changes missing coverage. Please review.
✅ Project coverage is 76.67%. Comparing base (1f49934) to head (70c5df6).
⚠️ Report is 21 commits behind head on master.

⚠️ Current head 70c5df6 differs from pull request most recent head 83a82d6

Please upload reports for the commit 83a82d6 to get more accurate results.

Files with missing lines	Patch %	Lines
internal/proxy/pipeline_trace.go	50.24%	95 Missing and 6 partials ⚠️

❌ Your patch check has failed because the patch coverage (56.27%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.
❌ Your project check has failed because the head coverage (76.67%) is below the target coverage (77.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #47736      +/-   ##
==========================================
- Coverage   76.71%   76.67%   -0.05%     
==========================================
  Files        2054     2055       +1     
  Lines      334563   334959     +396     
==========================================
+ Hits       256651   256815     +164     
- Misses      69783    69983     +200     
- Partials     8129     8161      +32     

Components	Coverage Δ
Client	78.70% <100.00%> (+0.23%)	⬆️
Core	83.22% <98.27%> (+0.01%)	⬆️
Go	74.89% <57.74%> (-0.09%)	⬇️

Files with missing lines	Coverage Δ
internal/core/src/segcore/reduce/GroupReduce.cpp	94.89% <100.00%> (+0.10%)	⬆️
internal/proxy/search_pipeline.go	81.09% <100.00%> (+0.06%)	⬆️
internal/proxy/search_reduce_util.go	78.75% <100.00%> (+0.04%)	⬆️
internal/proxy/task.go	77.87% <ø> (ø)
internal/proxy/task_search.go	69.65% <100.00%> (+0.13%)	⬆️
internal/querynodev2/delegator/delegator.go	84.74% <100.00%> (+0.10%)	⬆️
internal/util/function/rerank/util.go	84.70% <100.00%> (+0.33%)	⬆️
internal/proxy/pipeline_trace.go	50.24% <50.24%> (ø)

... and 35 files with indirect coverage changes

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[mergify]

@MrPresent-Han Thanks for your contribution. Please submit with DCO, see the contributing guide https://github.com/milvus-io/milvus/blob/master/CONTRIBUTING.md#developer-certificate-of-origin-dco.

[mergify]

@MrPresent-Han go-sdk check failed, comment rerun go-sdk can trigger the job again.

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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