Added checks to identify cause of segfault exposed in #2748#2750

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jajhall wants to merge 10 commits intolatestfrom

Commits on Jan 14, 2026

Commits on Jan 15, 2026

In highsSparseTranspose, mow using Astart[numCol] rather than Aindex.size() as number of nonzeros; formatted
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In debug, now calling HPresolve::checkCSC at hte end of HPresolve::toCSC
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Deleted unused method HPresolve::toCSR
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