setup cron local mail reporting and longhorn recurring backup job

ansible/arcodange/factory/playbooks/backup/postgres.yml

@@ -25,6 +25,16 @@
     - name: test backup_cmd
       ansible.builtin.shell: |
         {{ backup_cmd }} > /dev/null
+    
+    - name: Créer le script de backup
+      copy:
+        dest: "{{ scripts_dir }}/backup.sh"
+        mode: '0755'
+        content: |
+          #!/bin/bash
+          set -e
+          {{ backup_cmd }} | gzip > {{ backup_dir }}/backup_$(date +\%Y\%m\%d).sql.gz
+          find {{ backup_dir }} -type f -name 'backup_*.sql.gz' -mtime +{{ keep_days }} -delete
 
     - name: Ajouter une tâche cron pour dump PostgreSQL tous les jours à 4h avec compression
       cron:
@@ -32,9 +42,7 @@
         minute: "0"
         hour: "4"
         user: root
-        job: >-
-          {{ backup_cmd }} | gzip > {{ backup_dir }}/backup_$(date +\\%Y\\%m\\%d).sql.gz
-          && find {{ backup_dir }} -type f -name 'backup_*.sql.gz' -mtime +{{ keep_days }} -delete
+        job: "{{ scripts_dir }}/backup.sh"
 
     - name: Créer le script de restauration
       copy: