Steps to reproduce

1. Install LimeSurvey 7.0.5.
2. Use MariaDB 10.1.48 as the database server.
3. Update the LimeSurvey files to 7.0.7.
4. Open the administration interface and start the database update.

During Update_709, the update attempts to execute:

ALTER TABLE `lime_responses_<surveyId>`
ADD `Q<questionId>` JSON;

MariaDB 10.1 does not support the JSON data type, causing the update to fail with a SQL syntax error.

Expected result

Before starting any database migration, LimeSurvey should verify that the database server meets the documented minimum requirements (currently MariaDB 10.3.38 or newer).

If the database version is not supported, the updater should stop immediately and display a clear error message, for example:

MariaDB 10.3.38 or newer is required. Detected version: 10.1.48.

No database migration should be started.

Actual result

The updater starts the database migration without checking the MariaDB version.

The update fails during Update_709 with a SQL syntax error when attempting to add a JSON column. Since the migration has already started, the database is left in a partially updated state and every subsequent attempt to continue the update fails at the same step.

The documented minimum database version exists, but it is not validated before the update process begins, resulting in an avoidable failed upgrade.