[fwesselm]

Description

Fix #3461:

1. Handle small contributions in HPresolve::strengthenInequalities.
2. Added a test.

Checklist

• I have read the contributing guidelines
• This PR targets the latest branch
• Tests are passing
• Documentation was updated where relevant
• This PR is not primarily AI-generated (per the AI contributions policy in CONTRIBUTING.md)

[codecov]

Codecov Report

❌ Patch coverage is 97.29730% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 75.14%. Comparing base (b3e7094) to head (010d2a0).
⚠️ Report is 76 commits behind head on latest.

Files with missing lines	Patch %	Lines
highs/presolve/HPresolveStrengthenIneq.cpp	96.15%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           latest    #3468      +/-   ##
==========================================
- Coverage   75.14%   75.14%   -0.01%     
==========================================
  Files         460      460              
  Lines      112233   112256      +23     
  Branches    17792    17793       +1     
==========================================
+ Hits        84341    84355      +14     
- Misses      27610    27619       +9     
  Partials      282      282              

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