feat: 初始化考培练系统项目

- 从服务器拉取完整代码
- 按框架规范整理项目结构
- 配置 Drone CI 测试环境部署
- 包含后端(FastAPI)、前端(Vue3)、管理端

技术栈: Vue3 + TypeScript + FastAPI + MySQL

backend/app/core/middleware.py

@@ -0,0 +1,64 @@
+"""
+中间件定义
+"""
+import time
+import uuid
+from typing import Callable
+
+from fastapi import Request, Response
+from starlette.middleware.base import BaseHTTPMiddleware
+
+from app.core.logger import logger
+
+
+class RequestIDMiddleware(BaseHTTPMiddleware):
+    """请求ID中间件"""
+
+    async def dispatch(self, request: Request, call_next: Callable) -> Response:
+        # 生成请求ID
+        request_id = str(uuid.uuid4())
+
+        # 将请求ID添加到request状态
+        request.state.request_id = request_id
+
+        # 记录请求开始
+        start_time = time.time()
+
+        # 处理请求
+        response = await call_next(request)
+
+        # 计算处理时间
+        process_time = time.time() - start_time
+
+        # 添加响应头
+        response.headers["X-Request-ID"] = request_id
+        response.headers["X-Process-Time"] = str(process_time)
+
+        # 记录请求日志
+        logger.info(
+            "HTTP请求",
+            method=request.method,
+            url=str(request.url),
+            status_code=response.status_code,
+            process_time=process_time,
+            request_id=request_id,
+        )
+
+        return response
+
+
+class GlobalContextMiddleware(BaseHTTPMiddleware):
+    """全局上下文中间件"""
+
+    async def dispatch(self, request: Request, call_next: Callable) -> Response:
+        # 设置追踪ID（用于分布式追踪）
+        trace_id = request.headers.get("X-Trace-ID", str(uuid.uuid4()))
+        request.state.trace_id = trace_id
+
+        # 处理请求
+        response = await call_next(request)
+
+        # 添加追踪ID到响应头
+        response.headers["X-Trace-ID"] = trace_id
+
+        return response