✨ feat(*): 添加轨迹产物导出与规划速度倍率隔离

* 新增 FlyshotTrajectoryArtifactWriter，支持 saveTrajectory
  将规划结果导出到 Config/Data/name（JointTraj、CartTraj、
  ShotEvents 等）
* RobotConfig 新增 PlanningSpeedScale，区分规划阶段限速倍率
  与运行时 J519 下发倍率
* 轨迹缓存键纳入 planningSpeedScale，避免降速规划误用缓存
* 完善 FanucCommandClient 命令参数日志与状态通道重连
* 补充 RuntimeOrchestrationTests 覆盖产物导出与倍率隔离
* 更新 README 进度文档

tests/Flyshot.Server.IntegrationTests/StatusEndpointTests.cs

@@ -61,7 +61,12 @@ public sealed class StatusEndpointTests(FlyshotServerFactory factory) : IClassFi
         Assert.True(root.GetProperty("isSetup").GetBoolean());
         Assert.Equal("FANUC_LR_Mate_200iD", root.GetProperty("robotName").GetString());
         Assert.Equal(6, root.GetProperty("degreesOfFreedom").GetInt32());
-        Assert.Empty(root.GetProperty("uploadedTrajectories").EnumerateArray());
+        var uploadedTrajectories = root.GetProperty("uploadedTrajectories")
+            .EnumerateArray()
+            .Select(static value => value.GetString())
+            .ToArray();
+        Assert.Contains("20251015", uploadedTrajectories);
+        Assert.Contains("UTTC_MS11", uploadedTrajectories);
         Assert.Equal("Connected", snapshot.GetProperty("connectionState").GetString());
         Assert.True(snapshot.GetProperty("isEnabled").GetBoolean());
         Assert.False(snapshot.GetProperty("isInMotion").GetBoolean());