Add NHN Cloud API integration with async task support

- NHN Cloud API packages: token, vpc, compute, nks, storage
- REST API endpoints with Swagger documentation
- Async task processing for long-running operations
- CORS configuration for frontend integration
- Enhanced logging for debugging API calls

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

nhn/utils.py

@@ -0,0 +1,31 @@
+import requests
+from django.conf import settings
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+def verify_token_with_auth_server(token: str):
+    """
+    Verify token with external auth server.
+    """
+    url = settings.AUTH_VERIFY_URL
+    if not url:
+        logger.warning("AUTH_VERIFY_URL is not configured.")
+        return None
+
+    try:
+        response = requests.post(
+            url,
+            json={"token": token},
+            headers={"Content-Type": "application/json"},
+            timeout=5,
+        )
+        if response.status_code == 200:
+            return response.json()
+        else:
+            logger.error(f"Auth server returned status {response.status_code}")
+            return None
+    except requests.RequestException as e:
+        logger.error(f"Failed to verify token: {e}")
+        return None