CDPCMS 1.5.0

Updates like the CDP panel (723): on the development platform the top bar shows “CDPCMS x.y.z can be released” with a Release button; one click builds the package and puts it into the internal channel (installer.ctpf.network/cdpcms/internal). Every other website with CDPCMS shows “CDPCMS x.y.z available” with Update now; its admin decides when. The update runs as root on the server (cdpcms-update), shows its progress at the top, keeps a backup and restores it if something fails.
Link preview (722): every published page and post writes its Open Graph data (title, description, URL, type, site name, image, publish dates). The website prints it in its head with one line (cms/assets/og.php). Nothing to configure: the image is the featured image, otherwise the header logo.