Anders Olsson e8c9d4ed29 feat(api): add Game::ranked, one_v_one, free_for_all, custom constructors ...

Public Game API now returns Result<_, InferenceError> on invalid input
(p_draw out of range, outcome rank count mismatches team count).

New types:
- GameOptions { p_draw, convergence } — bundled config
- OwnedGame<T, D> — owned variant of Game that carries its result
  and weights internally (no borrow of History's slices). Returned
  by public constructors to avoid leaking internal borrow lifetimes.

The internal Game::new is renamed Game::ranked_with_arena (pub(crate))
and keeps the borrowing-arena signature for History's hot path. All
in-crate callers updated (21 call sites: 18 in game.rs tests, 2 in
time_slice.rs, 1 in history.rs).

Game::custom is a T2-minimal power-user escape hatch exposing raw
factor + schedule plumbing. Full ergonomics in T4 (#[doc(hidden)]
for now).

Game::log_evidence() accessor added on both Game and OwnedGame (was
previously accessible only through the pub(crate) evidence field).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-04-24 12:55:26 +02:00

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