[BUG] Failing tests on GB300

[KyleFromNVIDIA]

Describe the bug
While testing cuopt on GB300, I observed the following test failure:

=================================== FAILURES ===================================
_______________________ test_incumbent_get_set_solutions _______________________
[gw1] linux -- Python 3.14.6 /opt/conda/envs/test/bin/python3.14

    def test_incumbent_get_set_solutions():
>       _run_incumbent_solutions(include_set_callback=True)

tests/linear_programming/test_python_API.py:461: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

include_set_callback = True

    def _run_incumbent_solutions(include_set_callback):
        # Callback for incumbent solution
        class CustomGetSolutionCallback(GetSolutionCallback):
            def __init__(self, user_data):
                super().__init__()
                self.n_callbacks = 0
                self.solutions = []
                self.user_data = user_data
    
            def get_solution(
                self, solution, solution_cost, solution_bound, user_data
            ):
                assert user_data is self.user_data
                self.n_callbacks += 1
                assert len(solution) > 0
                assert len(solution_cost) == 1
                assert len(solution_bound) == 1
    
                self.solutions.append(
                    {
                        "solution": solution.tolist(),
                        "cost": float(solution_cost[0]),
                        "bound": float(solution_bound[0]),
                    }
                )
    
        class CustomSetSolutionCallback(SetSolutionCallback):
            def __init__(self, get_callback, user_data):
                super().__init__()
                self.n_callbacks = 0
                self.get_callback = get_callback
                self.user_data = user_data
    
            def set_solution(
                self, solution, solution_cost, solution_bound, user_data
            ):
                assert user_data is self.user_data
                self.n_callbacks += 1
                assert len(solution_bound) == 1
                if self.get_callback.solutions:
                    solution[:] = self.get_callback.solutions[-1]["solution"]
                    solution_cost[0] = float(
                        self.get_callback.solutions[-1]["cost"]
                    )
    
        prob = Problem()
        x = prob.addVariable(vtype=VType.INTEGER)
        y = prob.addVariable(vtype=VType.INTEGER)
        prob.addConstraint(2 * x + 4 * y >= 230)
        prob.addConstraint(3 * x + 2 * y <= 190)
        prob.setObjective(5 * x + 3 * y, sense=sense.MAXIMIZE)
    
        user_data = {"source": "test_incumbent_solutions"}
        get_callback = CustomGetSolutionCallback(user_data)
        set_callback = (
            CustomSetSolutionCallback(get_callback, user_data)
            if include_set_callback
            else None
        )
        settings = SolverSettings()
        settings.set_mip_callback(get_callback, user_data)
        if include_set_callback:
            settings.set_mip_callback(set_callback, user_data)
        settings.set_parameter("time_limit", 1)
    
        prob.solve(settings)
    
>       assert get_callback.n_callbacks > 0
E       assert 0 > 0
E        +  where 0 = <test_python_API._run_incumbent_solutions.<locals>.CustomGetSolutionCallback object at 0xefbc5f1d0350>.n_callbacks

tests/linear_programming/test_python_API.py:444: AssertionError

Steps/Code to reproduce bug
Run conda-python-tests on GB300

Expected behavior
All tests should pass

Additional context
https://github.com/NVIDIA/cuopt/actions/runs/30637311299/job/91192795962?pr=1565