fix: translate UnboundedOrInfeasible to UNBOUNDED, not INFEASIBLE

This is assert in a test with an unbounded problem (integer variable).

Author: rschwarz

mip/highs.py

@@ -792,7 +792,7 @@ def get_status(self: "SolverHighs") -> mip.OptimizationStatus:
             self._lib.kHighsModelStatusModelEmpty: OS.OTHER,
             self._lib.kHighsModelStatusOptimal: OS.OPTIMAL,
             self._lib.kHighsModelStatusInfeasible: OS.INFEASIBLE,
-            self._lib.kHighsModelStatusUnboundedOrInfeasible: OS.INFEASIBLE,
+            self._lib.kHighsModelStatusUnboundedOrInfeasible: OS.UNBOUNDED,  # or INFEASIBLE?
             self._lib.kHighsModelStatusUnbounded: OS.UNBOUNDED,
             self._lib.kHighsModelStatusObjectiveBound: None,
             self._lib.kHighsModelStatusObjectiveTarget: None,