✨ feat: 实现 ControllerClient HTTP 兼容层及 FANUC 运行时

- 新增 Flyshot.ControllerClientCompat 兼容层模块
  - 新增 Flyshot.Runtime.Fanuc 运行时模块
  - 新增 LegacyHttpApiController 暴露 HTTP 兼容 API
  - 补充 RuntimeOrchestrationTests 等测试覆盖
  - 补充 docs/ 兼容性需求与逆向工程文档
  - 更新 Host 注册、配置及解决方案引用

  变更概览：
  - Flyshot.ControllerClientCompat — 旧 ControllerClient 语义的 HTTP 适配
  - Flyshot.Runtime.Fanuc — IControllerRuntime 的 FANUC 真机实现
  - LegacyHttpApiController — HTTP API 兼容旧 SDK
  - docs/ — 兼容性需求与逆向工程分析文档
  - 测试：RuntimeOrchestrationTests、LegacyHttpApiCompatibilityTests

src/Flyshot.ControllerClientCompat/ControllerClientCompatServiceCollectionExtensions.cs

@@ -0,0 +1,39 @@
+using Flyshot.Core.Config;
+using Flyshot.Runtime.Common;
+using Flyshot.Runtime.Fanuc;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Options;
+
+namespace Flyshot.ControllerClientCompat;
+
+/// <summary>
+/// 提供 ControllerClient HTTP 兼容层的依赖注入注册入口。
+/// </summary>
+public static class ControllerClientCompatServiceCollectionExtensions
+{
+    /// <summary>
+    /// 将 HTTP-only 的 ControllerClient 兼容服务注册到当前宿主。
+    /// </summary>
+    /// <param name="services">当前宿主服务集合。</param>
+    /// <param name="configuration">宿主配置根。</param>
+    /// <returns>同一服务集合，便于链式调用。</returns>
+    public static IServiceCollection AddControllerClientCompat(this IServiceCollection services, IConfiguration configuration)
+    {
+        ArgumentNullException.ThrowIfNull(services);
+        ArgumentNullException.ThrowIfNull(configuration);
+
+        services
+            .AddOptions<ControllerClientCompatOptions>()
+            .Bind(configuration.GetSection("ControllerClientCompat"));
+
+        services.AddSingleton(static serviceProvider => serviceProvider.GetRequiredService<IOptions<ControllerClientCompatOptions>>().Value);
+        services.AddSingleton<RobotModelLoader>();
+        services.AddSingleton<ControllerClientCompatRobotCatalog>();
+        services.AddSingleton<ControllerClientTrajectoryOrchestrator>();
+        services.AddSingleton<IControllerRuntime, FanucControllerRuntime>();
+        services.AddSingleton<IControllerClientCompatService, ControllerClientCompatService>();
+
+        return services;
+    }
+}