feat: special duplicate check removal using static variables

[miyakoshi-dev]

Description

special duplicate check removal using static variables

Related links

https://tier4.atlassian.net/browse/RT2-1529

Notes for reviewers

Pre-review checklist for the PR author

• I've confirmed the contribution guidelines.
• The PR is ready for review.

In-review checklist for the PR reviewers

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• The PR has been properly tested.
• The PR has been reviewed.

Post-review checklist for the PR author

The PR author must check the checkboxes below before merging.

• There are no open discussions or they are tracked via tickets.
• The PR is ready for merge.

After all checkboxes are checked, anyone who has write access can merge the PR.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 54.36%. Comparing base (75e1c3f) to head (dff7f08).
Report is 14 commits behind head on main.

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Additional details and impacted files

@@             Coverage Diff             @@
##             main     #284       +/-   ##
===========================================
+ Coverage   25.02%   54.36%   +29.33%     
===========================================
  Files          58       28       -30     
  Lines        3321     2213     -1108     
  Branches     1085     1228      +143     
===========================================
+ Hits          831     1203      +372     
+ Misses       1756      732     -1024     
+ Partials      734      278      -456     

Flag	Coverage Δ
differential	54.36% <100.00%> (?)
total	?

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[xygyo77]

LGTM

[ymski]

LGTM