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/models/__init__.py

@@ -0,0 +1,49 @@
+"""数据库模型包"""
+from app.models.base import Base, BaseModel
+from app.models.user import User
+from app.models.course import Course, CourseMaterial, KnowledgePoint, GrowthPath
+from app.models.training import (
+    TrainingScene,
+    TrainingSession,
+    TrainingMessage,
+    TrainingReport,
+)
+from app.models.exam import Exam, Question, ExamResult
+from app.models.exam_mistake import ExamMistake
+from app.models.position import Position
+from app.models.position_member import PositionMember
+from app.models.position_course import PositionCourse
+from app.models.practice import PracticeScene, PracticeSession, PracticeDialogue, PracticeReport
+from app.models.system_log import SystemLog
+from app.models.task import Task, TaskCourse, TaskAssignment
+from app.models.notification import Notification
+
+__all__ = [
+    "Base",
+    "BaseModel",
+    "User",
+    "Course",
+    "CourseMaterial",
+    "KnowledgePoint",
+    "GrowthPath",
+    "TrainingScene",
+    "TrainingSession",
+    "TrainingMessage",
+    "TrainingReport",
+    "Exam",
+    "Question",
+    "ExamResult",
+    "ExamMistake",
+    "Position",
+    "PositionMember",
+    "PositionCourse",
+    "PracticeScene",
+    "PracticeSession",
+    "PracticeDialogue",
+    "PracticeReport",
+    "SystemLog",
+    "Task",
+    "TaskCourse",
+    "TaskAssignment",
+    "Notification",
+]