L’intégration via OpenID Connect nécessite-t-elle obligatoirement un plan professionnel ? Sinon, existe-t-il une méthode pour l’intégrer dans une version auto-hébergée ? Merci de bien vouloir clarifier ce point.
No it doesn’t! The hosted plans are not licenses to use any part of Discourse, they are simply hosting plans. Plugins are split between plans to allow a more efficient setup, as more plugins require more computing resource (RAM, storage, CPU speed etc). So you can use any plugin and as many plugins as you like on a self-hosted instance while taking note of the needed computing resource.