Fix operational point search performance issues

[leovalais]

fixes #10138

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 90.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 79.93%. Comparing base (3bc6d02) to head (3165f73).
Report is 74 commits behind head on dev.

Files with missing lines	Patch %	Lines
editoast/editoast_derive/src/search.rs	80.00%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##              dev   #10172      +/-   ##
==========================================
- Coverage   79.94%   79.93%   -0.01%     
==========================================
  Files        1057     1057              
  Lines      106302   106311       +9     
  Branches      724      724              
==========================================
- Hits        84980    84978       -2     
- Misses      21280    21291      +11     
  Partials       42       42              

Flag	Coverage Δ
editoast	73.89% <90.00%> (-0.03%)	⬇️
front	89.19% <ø> (ø)
gateway	2.18% <ø> (ø)
osrdyne	3.28% <ø> (ø)
railjson_generator	87.50% <ø> (ø)
tests	87.00% <ø> (ø)

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[flomonster]

LGTM