Migração db - Integração Pangolin Proxy

database/schema.sql

@@ -49,12 +49,14 @@ CREATE TABLE `servers` (
   `ip_v6` varchar(100) DEFAULT NULL,
   `serial_key` varchar(255) NOT NULL,
   `machine_id` varchar(255) DEFAULT NULL,
+  `last_seen` datetime DEFAULT NULL,
   `status` enum('active','inactive') NOT NULL DEFAULT 'active',
   `created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
   `updated_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
   PRIMARY KEY (`id`),
   UNIQUE KEY `serial_key` (`serial_key`),
   KEY `client_id` (`client_id`),
+  KEY `idx_last_seen` (`last_seen`),
   CONSTRAINT `fk_servers_client` FOREIGN KEY (`client_id`) REFERENCES `clients` (`id`) ON DELETE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;