Fix ntfy notification hooks to use Borgmatic 2.0 environment variables

Replace deprecated argument-based parameter passing with environment variables
and dynamic data retrieval for archive names and error messages.

Changes:
- Remove "{archive_name}" and "{error}" placeholders from config.yaml
- Update ntfy-success.sh to retrieve archive name via borgmatic list
- Update ntfy-error.sh to extract error messages from systemd logs
- Add repository information to both notification types

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

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

hooks/ntfy-error.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 #
 # Hook Borgmatic - Notification d'erreur via ntfy
-# Arguments: $1 = error message
+# Borgmatic 2.0 utilise des variables d'environnement
 #
 
 # Charger les variables d'environnement
@@ -9,7 +9,12 @@ if [ -f /etc/borgmatic/.env ]; then
     source /etc/borgmatic/.env
 fi
 
-ERROR_MSG="${1:-Erreur inconnue}"
+# Récupérer les dernières lignes d'erreur depuis les logs
+ERROR_MSG=$(journalctl -u borgmatic.service -n 10 --no-pager | tail -5 | sed 's/^.*borgmatic: //')
+
+if [ -z "$ERROR_MSG" ]; then
+    ERROR_MSG="Erreur inconnue - vérifiez les logs"
+fi
 
 # Envoyer notification d'erreur
 curl -s -u "$NTFY_USER" \
@@ -19,6 +24,7 @@ curl -s -u "$NTFY_USER" \
     -d "Le backup a échoué !
 Erreur: ${ERROR_MSG}
 Date: $(date '+%Y-%m-%d %H:%M:%S')
+Repository: ${BORG_REPO}
 Vérifiez les logs: journalctl -u borgmatic.service -n 50" \
     "$NTFY_URL"