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Claims [0][1][3][4]: implement Thm 3.3 exact MILP LMO (scipy.milp), Thm 3.5 lifted Frank-Wolfe (poly-time lifted LMO only), Cor 4.5 lifted-vs-exact (1+eps_lift) comparison, Table 1 MILP-vs-lifted cost

Update logbook: Repro - Optimal Design for Multinomial Logit Model