Integrate HiGHS and few minor fixes#5139

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PedramHooshangiAUGAI wants to merge 7 commits intogoogle:stablefrom

augmenta-ai:stable

Commits on Feb 19, 2026

ACORN-11226: Complete HiGHS v1.12.0 integration
PedramHooshangiAUGAI
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ACORN-11226: Fix HiGHS references and add IDE support
PedramHooshangiAUGAI
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Commits on Feb 20, 2026

Merge pull request #4 from augmenta-ai/pedram/ACORN-11226-UpdateORTools
PedramHooshangiAUGAI
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Commits on Mar 17, 2026

ACORN-11869: Populate variable values for FEASIBLE status in HiGHS solver
PedramHooshangiAUGAI
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Merge pull request #5 from augmenta-ai/pedram/ACORN-11869
PedramHooshangiAUGAI
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Commits on Mar 18, 2026