CREATE TABLE feature_templates (
    id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(120) NOT NULL,
    description VARCHAR(255) NULL,
    feature_keys JSON NOT NULL,
    created_by INT UNSIGNED NULL,
    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at DATETIME NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP,
    CONSTRAINT fk_feature_templates_user FOREIGN KEY (created_by) REFERENCES users (id) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;