Features:

- Node group CRUD operations with traffic-based filtering
  - Three grouping modes: average distribution, subscription-based, and traffic-based
  - Automatic and manual group recalculation with history tracking
  - Group assignment preview before applying changes
  - User subscription group locking to prevent automatic reassignment
  - Subscribe-to-group mapping configuration
  - Group calculation history and detailed reports
  - System configuration for group management (enabled/mode/auto_create)

  Database:
  - Add node_group table for group definitions
  - Add group_history and group_history_detail tables for tracking
  - Add node_group_ids (JSON) to nodes and subscribe tables
  - Add node_group_id and group_locked fields to user_subscribe table
  - Add migration files for schema changes

pkg/turnstile/service.go

@@ -56,7 +56,9 @@ func (s *service) verify(ctx context.Context, secret string, token string, ip st
 		_ = writer.WriteField("idempotency_key", key)
 	}
 	_ = writer.Close()
-	client := &http.Client{}
+	client := &http.Client{
+		Timeout: 5 * time.Second,
+	}
 	req, _ := http.NewRequest("POST", s.url, body)
 	req.Header.Set("Content-Type", writer.FormDataContentType())
 	firstResult, err := client.Do(req)