swaits
4882e1865d
`select_random` samples `count` decisions with replacement and clones them out of the population (spec §10.1). `tournament_select_single_objective` runs binary-or-larger tournaments with the spec's tiebreak order: feasible beats infeasible, lower violation among infeasibles, and direction-correct objective comparison among feasibles. Panics if not exactly one objective (spec §10.2). Selection helpers stay under `heuropt::selection` and are not part of the prelude (spec §15).