Add daily cleanup of old notifications in EventsWorker: Implement a new method to delete notifications older than 30 days, enhancing database management and reducing clutter. Update run loop to trigger this cleanup daily, ensuring timely maintenance of notification records.

src/worker/sql.rs

@@ -71,6 +71,12 @@ pub const QUERY_INSERT_NOTIFICATION_FULL: &str = r#"
     ) VALUES ($1, $2, $3, FALSE, NOW(), NOW());
 "#;
 
+/// Löscht alte Notifications (älter als 30 Tage)
+pub const QUERY_DELETE_OLD_NOTIFICATIONS: &str = r#"
+    DELETE FROM falukant_log.notification
+     WHERE created_at < NOW() - INTERVAL '30 days';
+"#;
+
 // Product pricing
 pub const QUERY_GET_PRODUCT_COST: &str = r#"
 SELECT sell_cost, sell_cost AS original_sell_cost FROM falukant_type.product WHERE id = $1;