fix: data race when accessing field_ when retrieving

[chyezh]

issue: #39148

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[chyezh]

rerun go-sdk

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/run-cpu-e2e

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 81.11%. Comparing base (826b726) to head (5bcf1b2).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
internal/core/src/segcore/SegmentSealedImpl.cpp	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #39151      +/-   ##
==========================================
- Coverage   81.16%   81.11%   -0.05%     
==========================================
  Files        1395     1395              
  Lines      197277   197280       +3     
==========================================
- Hits       160124   160033      -91     
- Misses      31539    31616      +77     
- Partials     5614     5631      +17     

Components	Coverage Δ
Client	79.53% <ø> (ø)
Core	69.65% <0.00%> (+<0.01%)	⬆️
Go	83.04% <ø> (-0.06%)	⬇️

Files with missing lines	Coverage Δ
internal/core/src/segcore/SegmentSealedImpl.cpp	83.91% <0.00%> (-0.25%)	⬇️

... and 27 files with indirect coverage changes

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/run-cpu-e2e

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

[chyezh]

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