Fix commands syntax for Borgmatic 2.0

- Use correct 'before: action' and 'after: action' syntax instead of 'name' and 'when: [before_backup]'
- Simplify hook structure: before/after action for create, after error for failures
- Remove invalid schema fields that caused validation errors
- Commands now validate without errors

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

config.yaml

@@ -64,24 +64,20 @@ checks:
 # Nombre d'archives à vérifier
 check_last: 3
 
-# Commandes/hooks pour notifications (nouvelle syntaxe Borgmatic 2.0)
+# Hooks pour notifications (syntaxe Borgmatic 2.0)
 commands:
-    - name: "Notification de démarrage"
-      when:
-          - before_backup
+    - before: action
+      when: [create]
       run:
           - echo "Backup démarré"
 
-    - name: "Notification de succès"
-      when:
-          - after_backup
+    - after: action
+      when: [create]
       run:
           - echo "Exécution hook de succès"
           - /etc/borgmatic/hooks/ntfy-success.sh "{archive_name}" "{stats}"
 
-    - name: "Notification d'erreur"
-      when:
-          - on_error
+    - after: error
       run:
           - echo "Exécution hook d'erreur"
           - /etc/borgmatic/hooks/ntfy-error.sh "{error}"