process news posting to Matrix via cronjob so that news are pushed when their publish date is reached and not immediately

provide account local part via Stud.IP config, use MATRIX_SERVER config entry for auto discovery as well as full URL

don't invite all users and get permissions on room creation but on actually calling the Stud.IP page and opening Matrix chat.

Invite course members on room creation, observers for course and user deletion or membership changes

Use (currently hard-coded) Element web server for iframe embedding, use real Matrix ID in mapping table