在源码原有基础上，修改完善EA

U4 EAroll u4

Project: Re‑create MoonDog V3 EA for XAUUSD, M15 timeframe. Strategy: gentle soft martingale, not aggressive infinite martingale. Deliver full unlocked MQ5 source code. No account lock, no machine‑binding, can run on unlimited VPS instances. All parameters adjustable: initial lot, add‑lot multiplier, add‑distance(pips), take‑profit, maximum add layers, total max drawdown limit, trading hour filter. Output detailed