CREATE TABLE IF NOT EXISTS plugin_communitybot_links (
  id INT AUTO_INCREMENT PRIMARY KEY,
  ticket_id INT NOT NULL,
  platform VARCHAR(20) NOT NULL,
  ext_user VARCHAR(64) NOT NULL,
  ext_chat VARCHAR(64) NOT NULL DEFAULT '',
  ext_name VARCHAR(120) NOT NULL DEFAULT '',
  created_at DATETIME NOT NULL,
  KEY idx_plugin_communitybot_ticket (ticket_id),
  KEY idx_plugin_communitybot_user (platform, ext_user, created_at)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4