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feat(timelines): add lprelax wrapper reasoner (HiGHS-based) - #261

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feat/lprelax-wrapper-lp-highs
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nrealus wants to merge 21 commits into
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feat/lprelax-wrapper-lp-highs

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@nrealus nrealus commented Oct 2, 2026

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Stacked on #260

[TODO]

notably for use by external reasoners
to mirror the name of the existing `Lp` reasoner based on minilp
a flag can be set to recover initial effects that may have been filtered out by the main encoding, due to being proven unable to support any condition.
if set, these the transition store will include transitions corresponding to these ground initial effects, with their default value, which may not necessarily be the one that the original filtered-out effect may have had!
(note, however, that this is not impactful for our use case)
… transitions

a flag can be set to allow condition transitions to be considered as possible supporters
a flag allows to choose whether equal columns are merged, using a union-find structure
the purpose is to validate that the lprelax is not unsound (doesn't deem solvable problems as unsolvable)
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