Smart workbench

1.配方索引改用原版的常量级接口取数量，不再每节点整表拷贝；
2.分支回滚改成“撤销日志”：只精确退回这一步真正动过的几个物品，不再拷贝整个仓库快照；
3.新增硬性时间闸，防止内置服务器卡死。

1. Recipe indexing now uses vanilla constant-time interfaces to get amounts, no longer copying the entire table per node.
2. Branch rollback has been changed to an “undo log”: it now only precisely reverts the few items actually changed by that step, instead of copying the whole inventory snapshot.
3. Added a hard time gate to prevent the integrated server from freezing.