forcePageFilter = (frame) => {
    if (frame.options.filter) {
        frame.options.filter = `(${frame.options.filter})+type:page`;
    } else {
        frame.options.filter = 'type:page';
    }
}
CASE:

- the content api endpoints for pages forces the model layer to return static pages only
- we have to enforce the filter

@TODO: https://github.com/TryGhost/Ghost/issues/10268