fix(oci): remove everything an OCI installation leaves, and name cluster events

AppImage/messages/de/common.json

@@ -6523,7 +6523,7 @@
         },
         "split_brain": {
           "title": "{hostname}: Clusterereignis gemeldet",
-          "body": "Ein Clusterereignis wurde gemeldet. Prüfen Sie den Clusterstatus und das ursprüngliche Ereignis für weitere Informationen.",
+          "body": "Ein Clusterereignis wurde gemeldet:\n{reason}",
           "label": "Clusterereignis"
         },
         "node_disconnect": {

AppImage/messages/es/common.json

@@ -6523,7 +6523,7 @@
         },
         "split_brain": {
           "title": "{hostname}: evento del clúster notificado",
-          "body": "Se ha notificado un evento del clúster. Consulta el estado del clúster y el evento original para obtener más detalles.",
+          "body": "Se ha notificado un evento del clúster:\n{reason}",
           "label": "Evento del clúster"
         },
         "node_disconnect": {

AppImage/messages/fr/common.json

@@ -6523,7 +6523,7 @@
         },
         "split_brain": {
           "title": "{hostname} : événement du cluster signalé",
-          "body": "Un événement du cluster a été signalé. Vérifiez l’état du cluster et l’événement d’origine pour plus de détails.",
+          "body": "Un événement du cluster a été signalé :\n{reason}",
           "label": "Événement du cluster"
         },
         "node_disconnect": {

AppImage/messages/it/common.json

@@ -6523,7 +6523,7 @@
         },
         "split_brain": {
           "title": "{hostname}: evento del cluster segnalato",
-          "body": "È stato segnalato un evento del cluster. Controlla lo stato del cluster e l'evento originale per maggiori dettagli.",
+          "body": "È stato segnalato un evento del cluster:\n{reason}",
           "label": "Evento del cluster"
         },
         "node_disconnect": {

AppImage/messages/pt/common.json

@@ -6523,7 +6523,7 @@
         },
         "split_brain": {
           "title": "{hostname}: evento do cluster comunicado",
-          "body": "Foi comunicado um evento do cluster. Verifique o estado do cluster e o evento original para obter mais detalhes.",
+          "body": "Foi comunicado um evento do cluster:\n{reason}",
           "label": "Evento do cluster"
         },
         "node_disconnect": {

AppImage/messages/sk/common.json

@@ -6522,7 +6522,7 @@
         },
         "split_brain": {
           "title": "{hostname}: hlásená udalosť klastra",
-          "body": "Bola hlásená udalosť klastra. Skontrolujte stav klastra a pôvodnú udalosť, kde nájdete ďalšie podrobnosti.",
+          "body": "Bola hlásená udalosť klastra:\n{reason}",
           "label": "Udalosť klastra"
         },
         "node_disconnect": {

AppImage/messages/sv/common.json

@@ -6523,7 +6523,7 @@
         },
         "split_brain": {
           "title": "{hostname}: klusterhändelse rapporterad",
-          "body": "En klusterhändelse har rapporterats. Kontrollera klusterstatus och den ursprungliga händelsen för mer information.",
+          "body": "En klusterhändelse har rapporterats:\n{reason}",
           "label": "Klusterhändelse"
         },
         "node_disconnect": {

AppImage/scripts/notification_events.py

@@ -4367,8 +4367,9 @@ class ProxmoxHookWatcher:
         # "🔵 constructor: Problema del sistema detectado" / "+1 problema
         # más del sistema (Problemas adicionales: - problema_del_sistema)"
         # messages the operator sees on Telegram. Preserve the PVE payload
-        # as `reason` so both surfaces have concrete text to render.
-        if event_type == 'system_problem':
+        # as `reason` so both surfaces have concrete text to render. A cluster
+        # event (fencing) renders it too: the message is what happened.
+        if event_type in ('system_problem', 'split_brain'):
             reason_text = (message or title or '').strip()
             if reason_text:
                 data['reason'] = reason_text[:500]

AppImage/scripts/notification_templates.py

@@ -1218,7 +1218,7 @@ TEMPLATES = {
     # ── Cluster events ──
     'split_brain': {
         'title': '{hostname}: Cluster event reported',
-        'body': 'A cluster event was reported. Review cluster status and the source event for details.',
+        'body': 'A cluster event was reported:\n{reason}',
         'label': 'Cluster event',
         'group': 'cluster',
         'default_enabled': True,