Handbook
board_game_rank_moves v1
Invariant: ranked_move_ids must be a permutation of the input legal_moves identifiers (no omissions, no extras, no duplicates).
Input: player_view, legal_moves (as in board_game_choose_move), optional ranking_criteria, temperature, timeout_sec.
Output: {ranked_move_ids: [string, ...], ranking_criteria: string} (criteria echoed).