[GDPR] Remove old orders and addresses (#526)

* [GDPR] Remove old orders and addresses

* Delete from carts as well

* Prepare release

migrations/000.606.sql

@@ -0,0 +1,23 @@
+-- DELETE orders that are more than 7 years old from the database
+
+BEGIN;
+    DELETE FROM order_rows WHERE order_id IN (
+        SELECT id FROM orders WHERE inserted < date_trunc('year', now() - interval '7 years')
+    );
+
+    DELETE FROM invoices WHERE order_id IN (
+        SELECT id FROM orders WHERE inserted < date_trunc('year', now() - interval '7 years')
+    );
+
+    DELETE FROM carts WHERE order_id IN (
+        SELECT id FROM orders WHERE inserted < date_trunc('year', now() - interval '7 years')
+    );
+
+    DELETE FROM orders WHERE inserted < date_trunc('year', now() - interval '7 years');
+COMMIT;
+
+DELETE FROM addresses addr WHERE NOT EXISTS (
+    SELECT NULL FROM samples s WHERE addr.id = s.address_id
+) AND NOT EXISTS (
+    SELECT NULL FROM orders o WHERE addr.id = o.billing_address_id OR addr.id = o.delivery_address_id
+);