✨ feat(fanuc): 优化 J519 实时下发与飞拍起停整形

- 改为高优先级 J519 接收线程与复用缓冲区发送链路
- 增加稠密执行前的 J519 就绪重试与状态诊断
- 修正程序状态响应字段顺序与 EnableRobot 默认参数
- 为飞拍轨迹补充平滑起停时间轴与首尾整形验证
- 补充真实运行配置、报警窗口与边界对比测试
- 同步更新限值文档、分析脚本与 .NET 8 SDK 固定配置

tests/Flyshot.Core.Tests/FanucCommandClientTests.cs

@@ -99,7 +99,7 @@ public sealed class FanucCommandClientTests : IDisposable
     {
         using var client = new FanucCommandClient();
         var expectedFrame = FanucCommandProtocol.PackProgramCommand(FanucCommandMessageIds.GetProgramStatus, "RVBUSTSM");
-        var responseFrame = Convert.FromHexString("646f7a000000160000200300000000000000017a6f64");
+        var responseFrame = Convert.FromHexString("646f7a000000160000200300000001000000007a6f64");
         var handlerTask = RunSingleResponseControllerAsync(expectedFrame, responseFrame, _cts.Token);
 
         await client.ConnectAsync("127.0.0.1", Port, _cts.Token);