fix: Fix null offset loading in inverted index

[sunby]

issue: #40516
pr: #40523

[sre-ci-robot]

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[mergify]

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

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

[codecov]

Codecov Report

Attention: Patch coverage is 78.57143% with 9 lines in your changes missing coverage. Please review.

Project coverage is 80.93%. Comparing base (004668b) to head (1ad260b).

Files with missing lines	Patch %	Lines
internal/core/src/index/InvertedIndexTantivy.cpp	78.04%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              2.5   #40524      +/-   ##
==========================================
+ Coverage   80.91%   80.93%   +0.02%     
==========================================
  Files        1421     1421              
  Lines      200844   200856      +12     
==========================================
+ Hits       162513   162563      +50     
+ Misses      32639    32611      -28     
+ Partials     5692     5682      -10     

Components	Coverage Δ
Client	79.77% <ø> (ø)
Core	70.34% <78.57%> (-0.02%)	⬇️
Go	82.82% <ø> (+0.02%)	⬆️

Files with missing lines	Coverage Δ
internal/core/src/common/Array.h	92.36% <100.00%> (ø)
internal/core/src/index/InvertedIndexTantivy.cpp	85.06% <78.04%> (-1.97%)	⬇️

... and 29 files with indirect coverage changes

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[mergify]

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

[liliu-z]

/lgtm

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: liliu-z, liliuleo, sunby

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[sunby]

/run-cpu-e2e

[yanliang567]

/run-cpu-e2e