feat: Allow to backup postgresql

defaults/main.yml

@@ -35,4 +35,5 @@ borgmatic_passphrase: ""
 borgmatic_actions: {}
 
 borgmatic_mariadb_enabled: false
+borgmatic_postgresql_enabled: false
 borgmatic_restore_first: false

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 %}