fix: optimize compliance scan performance and improve error handling

- Refactor scan_compliance to eliminate N+1 queries using joinedload and batch loading
- Add try-except wrapper in compliance scan API endpoint
- Improve frontend axios error interceptor to display detail/message/timeout errors
- Update CORS config and nginx for domain deployment

frontend/nginx.conf

@@ -1,9 +1,23 @@
+# HTTP redirect to HTTPS
 server {
     listen 80;
     server_name datapointer.cnroc.cn localhost _;
+    return 301 https://$host$request_uri;
+}
+
+server {
+    listen 443 ssl;
+    server_name datapointer.cnroc.cn localhost _;
     root /usr/share/nginx/html;
     index index.html;
 
+    # SSL certificates
+    ssl_certificate /etc/nginx/ssl/fullchain.pem;
+    ssl_certificate_key /etc/nginx/ssl/privkey.pem;
+    ssl_protocols TLSv1.2 TLSv1.3;
+    ssl_ciphers HIGH:!aNULL:!MD5;
+    ssl_prefer_server_ciphers on;
+
     # Gzip compression
     gzip on;
     gzip_vary on;