Yaho Yacht Engine
Based on yahtzee-engine by Chen-Pang He (https://jdh8.org).
https://github.com/jdh8/yahtzee-engine
Upstream commit: 2d9f4e14a05295a0606e398919840249da6800df
License: Apache-2.0 (included as LICENSE).

Modifications: twelve-category Yacht scoring, no joker or extra Yacht bonus,
18-bit continuation-table state, versioned/verified table format, JSON-lines
native protocol, shared-buffer WASM ABI, deterministic request validation,
offline table builder, and independent numerical/cross-runtime tests.
src/dice.rs and src/tables.rs preserve the upstream combinatorial core.
src/solver.rs adapts upstream exact backward induction and canonical tie order.
Unmodified source snapshots and hashes are in upstream/.