refactor: 替换废弃的datetime.utcnow()为datetime.now(timezone.utc)

- Python 3.12+ 中 datetime.utcnow() 已废弃
- 替换为推荐写法 datetime.now(timezone.utc)
- 涉及 jwt_service.py 和 health.py 共4处
- 2个文件，+6/-6

apps/api/app/api/routes/health.py

@@ -1,4 +1,4 @@
-from datetime import datetime
+from datetime import datetime, timezone
 
 import psycopg2
 import redis
@@ -13,7 +13,7 @@ router = APIRouter(tags=["Health"])
 async def health_check():
     return {
         "status": "healthy",
-        "timestamp": datetime.utcnow().isoformat(),
+        "timestamp": datetime.now(timezone.utc).isoformat(),
         "version": settings.APP_VERSION,
     }
 
@@ -33,7 +33,7 @@ async def startup_check():
     all_ready = all(check["status"] == "healthy" for check in checks.values())
     response = {
         "status": "started" if all_ready else "starting",
-        "timestamp": datetime.utcnow().isoformat(),
+        "timestamp": datetime.now(timezone.utc).isoformat(),
         "checks": checks,
     }
     if not all_ready:

packages/application/auth/jwt_service.py

@@ -1,6 +1,6 @@
 """JWT Token 生成、验证、解析服务"""
 
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 from typing import Any, Dict, Optional
 
 import jwt
@@ -88,7 +88,7 @@ class JWTService(JWTServicePort):
         Returns:
             JWT Token 字符串
         """
-        now = datetime.utcnow()
+        now = datetime.now(timezone.utc)
         expire = now + timedelta(minutes=self.config.ACCESS_TOKEN_EXPIRE_MINUTES)  # noqa: E501
 
         payload = {
@@ -115,7 +115,7 @@ class JWTService(JWTServicePort):
         Returns:
             JWT Token 字符串
         """
-        now = datetime.utcnow()
+        now = datetime.now(timezone.utc)
         expire = now + timedelta(days=self.config.REFRESH_TOKEN_EXPIRE_DAYS)
 
         payload = {