fix: Fix improper use of offset in HybridSearch

[czs007]

pr : #36244
issue : #36243

[codecov]

Codecov Report

Attention: Patch coverage is 79.06977% with 9 lines in your changes missing coverage. Please review.

Project coverage is 71.85%. Comparing base (16daf91) to head (7812173).
Report is 3 commits behind head on 2.4.

Files with missing lines	Patch %	Lines
internal/proxy/search_util.go	77.77%	8 Missing ⚠️
internal/proxy/task_search.go	85.71%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              2.4   #36253      +/-   ##
==========================================
- Coverage   71.90%   71.85%   -0.06%     
==========================================
  Files        1060     1060              
  Lines      139553   139567      +14     
==========================================
- Hits       100349   100286      -63     
- Misses      34918    34984      +66     
- Partials     4286     4297      +11     

Files with missing lines	Coverage Δ
internal/proxy/task_search.go	76.86% <85.71%> (-0.05%)	⬇️
internal/proxy/search_util.go	82.77% <77.77%> (-1.85%)	⬇️

... and 32 files with indirect coverage changes

[congqixia]

/lgtm

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: congqixia, czs007

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