Compliance: Anti-proxy RTT check + tiered usage policy and disclaimer

Refine: Subtract server processing time from auth heartbeat RTT for proxy detection

chore: add MIT LICENSE + remove RAT-named related project link

ReadMe.md

@@ -716,7 +716,6 @@ cd macos
 ## 相关项目
 
 - [HoldingHands](https://github.com/yuanyuanxiang/HoldingHands) - 全英文界面远程控制
-- [BGW RAT](https://github.com/yuanyuanxiang/BGW_RAT) - 大灰狼 9.5
 - [Gh0st](https://github.com/yuanyuanxiang/Gh0st) - 经典 Gh0st 实现
 
 ---
@@ -728,7 +727,6 @@ cd macos
 | **QQ** | 962914132 |
 | **Telegram** | [@doge_grandfather](https://t.me/doge_grandfather) |
 | **Email** | [yuanyuanxiang163@gmail.com](mailto:yuanyuanxiang163@gmail.com) |
-| **LinkedIn** | [wishyuanqi](https://www.linkedin.com/in/wishyuanqi) |
 | **Issues** | [问题反馈](https://t.me/SimpleRemoter) |
 | **PR** | [贡献代码](https://git.simpleremoter.com/) |