add:添加短链接服务

initialize/migrate/database/02118_traffic_log_idx.up.sql

@@ -1,2 +1,15 @@
-ALTER TABLE traffic_log ADD INDEX IF NOT EXISTS idx_timestamp (timestamp);
+SET @index_exists = (
+    SELECT COUNT(1)
+    FROM information_schema.STATISTICS
+    WHERE TABLE_SCHEMA = DATABASE()
+      AND TABLE_NAME = 'traffic_log'
+      AND INDEX_NAME = 'idx_timestamp'
+);
 
+SET @sql = IF(@index_exists = 0,
+    'CREATE INDEX idx_timestamp ON traffic_log (timestamp)',
+    'SELECT ''Index already exists'' AS message');
+
+PREPARE stmt FROM @sql;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;

initialize/migrate/database/20260123_add_app_version.up.sql

@@ -0,0 +1,18 @@
+CREATE TABLE IF NOT EXISTS `application_versions` (
+  `id` bigint(20) NOT NULL AUTO_INCREMENT,
+  `platform` varchar(50) NOT NULL COMMENT 'Platform',
+  `version` varchar(50) NOT NULL COMMENT 'Version Number',
+  `min_version` varchar(50) DEFAULT NULL COMMENT 'Minimum Force Update Version',
+  `force_update` tinyint(1) NOT NULL DEFAULT '0' COMMENT 'Force Update',
+  `url` varchar(255) NOT NULL COMMENT 'Download URL',
+  `description` json DEFAULT NULL COMMENT 'Update Description',
+  `is_default` tinyint(1) NOT NULL DEFAULT '0' COMMENT 'Is Default Version',
+  `is_in_review` tinyint(1) NOT NULL DEFAULT '0' COMMENT 'Is In Review',
+  `created_at` datetime(3) DEFAULT NULL COMMENT 'Create Time',
+  `updated_at` datetime(3) DEFAULT NULL COMMENT 'Update Time',
+  `deleted_at` datetime(3) DEFAULT NULL,
+  PRIMARY KEY (`id`),
+  KEY `idx_application_versions_deleted_at` (`deleted_at`),
+  KEY `idx_platform` (`platform`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='Application Version Management';
+