JEV Route：把交易策略限制写进钱包会话密钥
JEV Route 更新两项：策略限额从应用层移入钱包会话密钥（单笔上限、日限额、滑点、有效期等由钱包强制拒签），并让策略可读取行情数据，每笔交易前校验价格与波动条件并记录结果。
Two updates just landed on JEV Route, and they change what an agent is. First: the rules moved from the app into the wallet. Policy limits used to be checked before a trade was built. Now the agent's session key carries the limits itself: per trade cap, daily cap, total budget, minimum interval, slippage ceiling, expiry. Even if something upstream went wrong, the wallet refuses to sign anything outside the policy. The enforcement isn't a promise in our code. It travels with the key. Second: policies can now read the market. A policy can say: only trade if the asset is above a price you set. Only buy below a price you set. Or stand down if anything moved more than 3% today. Real feed data, checked before every single trade, and the pass or fail is written on the trade record. So an agent isn't just "allowed to swap with limits". It's allowed to swap with limits the wallet itself enforces, under market conditions it proves it checked. Forks inherit all of it. Fork a policy, you get the wallet enforcement and the market gates with it. Autonomy with rules that can't be argued with!