GitLab

- Modify `WafService` struct to include listener information
- Update `GetWaf` method to retrieve and format listener details
- Enhance `ListListenerWafStatus` to return hosts for each listener
- Remove commented-out code and unused port list logic

- Modified SQL migration to add 'hosts' column to gateway_listeners table
- Updated model, service, and controller to support hosts in gateway listener operations
- Added new GetWafGatewayInfo method to retrieve WAF gateway information
- Refactored WAF service methods to handle hosts and improve flexibility