The standard structured weight/reference vector generator for
many-objective MOEAs (NSGA-III, MOEA/D). Generates (H+M-1 choose M-1)
points uniformly distributed on the unit simplex by enumerating all
integer compositions of `divisions` into `num_objectives` parts and
dividing each by `divisions`.
Lives in src/pareto/reference_points.rs. Re-exported from the prelude
as `das_dennis`.
Tests cover: M=2/H=4 → 5 points along the diagonal; M=3/H=12 → 91
points (the canonical NSGA-III 3-objective ref set); each generated
point has exactly M components summing to 1 within float tolerance.
swaits