feat: update medical training case and auth modules

config/health.py

@@ -0,0 +1,27 @@
+"""健康检查：服务存活与数据库连通性。"""
+
+from django.db import connection
+from django.db.utils import OperationalError
+from rest_framework.decorators import api_view, permission_classes
+from rest_framework.permissions import AllowAny
+from rest_framework.response import Response
+
+
+@api_view(['GET', 'HEAD'])
+@permission_classes([AllowAny])
+def ping(request):
+    """服务存活探测，通则返回 ok。"""
+    return Response('ok')
+
+
+@api_view(['GET', 'HEAD'])
+@permission_classes([AllowAny])
+def test_mysql(request):
+    """MySQL 连通探测：使用 Django 连接池建立连接，通则 ok，否则返回没连通。"""
+    try:
+        connection.ensure_connection()
+    except OperationalError:
+        return Response('没连通', status=503)
+    except Exception:
+        return Response('没连通', status=503)
+    return Response('ok')