Reset fluid state after convergence failure#4088
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This PR fixes a bug breaking determinism in numerical Jacobian tests, where iterate-dependent constitutive state persisted across Newton attempts. While
CompositionalMultiphaseBase::resetStateToBeginningOfStepcorrectly restored primary variables (pressure, compositional density, and temperature), it failed to clearm_kValuesand other fluid properties.This PR updates
CompositionalMultiphaseBase::resetStateToBeginningOfStepto explicitly discard warm-started state held by the fluid model by callingfluid.initializeState(). This guarantees that rolled-back steps start clean and do not inherit iterate-dependent state from failed Newton attempts.