feat(backend): T1.1 认证与权限 — 注册/登录/刷新/获取用户

- 后端：auth 路由（register/login/refresh/me）+ JWT + bcrypt 密码哈希
- 依赖注入：get_current_user + require_role 角色权限校验
- 跨数据库兼容：JSONBType（PG 用 JSONB，SQLite 用 JSON）
- 测试：11 个认证测试 + 4 个健康检查测试 = 15 passed

backend/app/main.py

@@ -10,6 +10,7 @@ from fastapi import FastAPI, Request
 from fastapi.middleware.cors import CORSMiddleware
 from fastapi.responses import JSONResponse
 
+from app.routers.auth import router as auth_router
 from app.schemas.common import error
 
 
@@ -63,3 +64,6 @@ async def global_exception_handler(request: Request, exc: Exception):
 async def health_check():
     """健康检查端点。"""
     return {"status": "ok", "service": "aiportpilot-backend", "version": "0.1.0"}
+
+
+app.include_router(auth_router, prefix="/api/v1")