feat: 添加JWT令牌刷新功能

- 新增 @nestjs/jwt 和 jsonwebtoken 依赖包
- 实现 refreshAccessToken 方法支持令牌续期
- 添加 RefreshTokenDto 和 RefreshTokenResponseDto
- 新增 /auth/refresh-token 接口
- 完善令牌刷新的限流和超时控制
- 增加相关单元测试覆盖
- 优化错误处理和日志记录

package.json

@@ -25,6 +25,7 @@
     "@nestjs/common": "^11.1.9",
     "@nestjs/config": "^4.0.2",
     "@nestjs/core": "^11.1.9",
+    "@nestjs/jwt": "^11.0.2",
     "@nestjs/platform-express": "^10.4.20",
     "@nestjs/platform-socket.io": "^10.4.20",
     "@nestjs/schedule": "^4.1.2",
@@ -40,6 +41,7 @@
     "class-transformer": "^0.5.1",
     "class-validator": "^0.14.3",
     "ioredis": "^5.8.2",
+    "jsonwebtoken": "^9.0.3",
     "mysql2": "^3.16.0",
     "nestjs-pino": "^4.5.0",
     "nodemailer": "^6.10.1",
@@ -59,6 +61,7 @@
     "@nestjs/testing": "^10.4.20",
     "@types/express": "^5.0.6",
     "@types/jest": "^29.5.14",
+    "@types/jsonwebtoken": "^9.0.10",
     "@types/node": "^20.19.27",
     "@types/nodemailer": "^6.4.14",
     "@types/supertest": "^6.0.3",