统一 Dump、Logging、Database 等功能的配置文件加载和定义类，优化ConfigLoader，职责分散各个模块。

XP.Common/Logging/Configs/SerilogConfig.cs

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+using System;
+using System.IO;
+
+namespace XP.Common.Logging.Configs
+{
+    /// <summary>
+    /// Serilog 日志配置实体（从 App.config 读取）| Serilog logging configuration entity (loaded from App.config)
+    /// </summary>
+    public class SerilogConfig
+    {
+        /// <summary>
+        /// 日志输出根路径（默认：AppData/Files/Logs）| Log output root path (default: AppData/Files/Logs)
+        /// </summary>
+        public string LogPath { get; set; } = Path.Combine(
+            Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
+            "Files", "Logs");
+
+        /// <summary>
+        /// 最低日志级别（Debug/Info/Warn/Error/Fatal）| Minimum log level
+        /// </summary>
+        public string MinimumLevel { get; set; } = "Info";
+
+        /// <summary>
+        /// 是否输出到控制台（调试环境=true，生产环境=false）| Whether to output to console
+        /// </summary>
+        public bool EnableConsole { get; set; } = true;
+
+        /// <summary>
+        /// 日志文件分割规则（Day/Month/Hour/Size）| Log file rolling interval
+        /// </summary>
+        public string RollingInterval { get; set; } = "Day";
+
+        /// <summary>
+        /// 单个日志文件最大大小（MB，仅 Size 分割时生效）| Single log file max size (MB)
+        /// </summary>
+        public long FileSizeLimitMB { get; set; } = 100;
+
+        /// <summary>
+        /// 保留日志文件数量（默认30天）| Retained file count limit (default 30)
+        /// </summary>
+        public int RetainedFileCountLimit { get; set; } = 30;
+    }
+}