CREATE TABLE IF NOT EXISTS `sms_logs` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `client_id` int(11) DEFAULT NULL,
  `user_id` int(11) DEFAULT NULL,
  `sender` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
  `recipient` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
  `message` text COLLATE utf8mb4_unicode_ci NOT NULL,
  `status` varchar(50) COLLATE utf8mb4_unicode_ci NOT NULL,
  `created_at` timestamp NOT NULL DEFAULT current_timestamp(),
  PRIMARY KEY (`id`),
  KEY `client_id` (`client_id`),
  KEY `user_id` (`user_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;