enhance: fix inconsistenty of alias and db for query iterator(#39045)

[MrPresent-Han]

related: #39045
pr: #39248

[mergify]

@MrPresent-Han E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[codecov]

Codecov Report

Attention: Patch coverage is 64.70588% with 12 lines in your changes missing coverage. Please review.

Project coverage is 80.43%. Comparing base (995d5e1) to head (13ae267).
Report is 5 commits behind head on 2.4.

Files with missing lines	Patch %	Lines
internal/proxy/task_query.go	23.07%	8 Missing and 2 partials ⚠️
internal/proxy/search_util.go	87.50%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              2.4   #39301      +/-   ##
==========================================
- Coverage   80.44%   80.43%   -0.01%     
==========================================
  Files        1079     1079              
  Lines      169909   169928      +19     
==========================================
+ Hits       136678   136682       +4     
- Misses      28730    28745      +15     
  Partials     4501     4501              

Files with missing lines	Coverage Δ
internal/proxy/task.go	81.59% <ø> (ø)
internal/proxy/task_search.go	74.74% <100.00%> (+0.12%)	⬆️
internal/proxy/search_util.go	80.76% <87.50%> (+0.22%)	⬆️
internal/proxy/task_query.go	78.73% <23.07%> (-1.43%)	⬇️

... and 26 files with indirect coverage changes

[MrPresent-Han]

/run-cpu-e2e

[PwzXxm]

/lgtm

[liliu-z]

/lgtm
/approve

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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