refactor: 完成项目整体目录重构与路径别名配置

1.  重构项目文件结构，统一文件存放位置与命名规则
2.  配置tsconfig路径别名，替换原有相对路径导入
3.  迁移drama-status枚举到dramas.types统一管理
4.  新增全局配置文件与工具类，补充完整注释与文档
5.  修复所有导入路径与依赖引用问题

utils/request-context.util.ts

@@ -1,10 +1,17 @@
-import { Request } from 'express';
+/**
+ * Request context util.
+ * @file 请求上下文工具
+ * @module utils/request-context.util
+ * @author zhxiao1124
+ */
+
+import { Request } from "express";
 
 export function getRequestCost(request: Request & { startTime?: bigint }) {
-  if (!request.startTime) {
-    return 0;
-  }
+    if (!request.startTime) {
+        return 0;
+    }
 
-  const diff = process.hrtime.bigint() - request.startTime;
-  return Number(diff / BigInt(1_000_000));
+    const diff = process.hrtime.bigint() - request.startTime;
+    return Number(diff / BigInt(1_000_000));
 }