This update prepares Guatemala localization for a forthcoming electronic invoicing capability. It allows certain test VAT numbers for Guatemalan companies and adds a fuel-related accounting entry needed for local compliance workflows.

related enterprise PR: https://github.com/odoo/enterprise/pull/84036

The IoT Box homepage warning now states that the SSL certificate is invalid, without incorrectly mentioning a missing subscription. This avoids confusing users because a subscription is no longer required to obtain a valid certificate.

When the IoT Box doesn't have a valid ssl certificate, we used to display a warning telling that there is no valid subscription. As users don't need a subscription anymore to get a valid certificate, we now only tell that the certificate is invalid.

Task: 4978644