完成进程启动器接口的设计

SHH.ProcessLaunchers/ILauncherLogger.cs

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+namespace SHH.ProcessLaunchers
+{
+    /// <summary>
+    /// 启动器专用日志接口
+    /// <para>核心职责：解耦日志的生产与消费，支持结构化语义记录。</para>
+    /// <para>实现类可将日志转发至 UI 控制台、本地文件或远程日志中心。</para>
+    /// </summary>
+    public interface ILauncherLogger
+    {
+        /// <summary>
+        /// 记录普通控制台日志 (流式日志)
+        /// <para>用于接管子进程的 StdOut 和 StdErr</para>
+        /// </summary>
+        /// <param name="processId">进程唯一标识 (ProcessConfig.Id)</param>
+        /// <param name="message">日志内容</param>
+        /// <param name="isError">是否为错误流 (True=StdErr, False=StdOut)</param>
+        void LogConsole(string processId, string message, bool isError);
+
+        /// <summary>
+        /// 记录关键生命周期事件 (结构化日志)
+        /// <para>用于记录启停、崩溃、熔断等关键节点，供运维分析。</para>
+        /// </summary>
+        /// <param name="processId">进程唯一标识 (ProcessConfig.Id)</param>
+        /// <param name="action">动作类型 (Start/Stop/Crash...)</param>
+        /// <param name="trigger">触发源 (User/System...)</param>
+        /// <param name="reason">操作原因或备注 (必填，用于追溯)</param>
+        /// <param name="payload">附加上下文对象 (可选，如 { PID=123, ExitCode=-1 })</param>
+        void LogLifecycle(string processId, LogAction action, LogTrigger trigger, string reason, object payload = null);
+    }
+
+    /// <summary>
+    /// 默认空日志实现 (Null Object Pattern)
+    /// <para>用于在未注入 Logger 时防止 NullReferenceException，保证程序健壮性。</para>
+    /// </summary>
+    public class NullLogger : ILauncherLogger
+    {
+        /// <summary>
+        /// 空实现：忽略控制台日志
+        /// </summary>
+        public void LogConsole(string processId, string message, bool isError)
+        {
+            // Do nothing
+        }
+
+        /// <summary>
+        /// 空实现：忽略生命周期日志
+        /// </summary>
+        public void LogLifecycle(string processId, LogAction action, LogTrigger trigger, string reason, object payload = null)
+        {
+            // Do nothing
+        }
+    }
+}