Add automation module to settings and update app labels

- Registered the new AutomationConfig in the INSTALLED_APPS of settings.py.
- Set the app_label for AutomationRule and ScheduledTask models to 'automation' for better organization and clarity in the database schema.

backend/igny8_core/settings.py

@@ -51,6 +51,7 @@ INSTALLED_APPS = [
     'igny8_core.modules.writer.apps.WriterConfig',
     'igny8_core.modules.system.apps.SystemConfig',
     'igny8_core.modules.billing.apps.BillingConfig',
+    'igny8_core.modules.automation.apps.AutomationConfig',
 ]
 
 # System module needs explicit registration for admin