MILP via REST
Same problem as LP (maximize 40x + 30y, 2x+3y≤240, 4x+2y≤200) with variable_types: first variable integer, second continuous.
Requires: cuOpt server running. Run: python client.py (exits 0 if server unreachable).
Server URL: --server (default http://localhost:8000). Variable types: continuous, integer, binary.