ResolvedCol struct
#include <gtopt/element_column_resolver.hpp>
A resolved LP column together with its physical-to-LP scale factor.
The scale field satisfies: physical_value = LP_value * scale.
When assembling a user constraint coeff * physical_var [op] RHS the LP-level coefficient is coeff * scale so that the constraint remains dimensionally correct regardless of internal LP scaling choices (e.g. reservoir volume in Gm3, theta in milli-radians, ...).