feat: Allow to backup postgresql

templates/config.yaml.j2

@@ -59,3 +59,11 @@ mariadb_databases:
     format: sql
     add_drop_database: true
 {% endif %}
+
+{% if borgmatic_postgresql_enabled %}
+postgresql_databases:
+  - name: all
+    username: postgres
+    format: plain
+    add_drop_database: true
+{% endif %}