Archive old migrations (#426)

* Archive old migrations

* Fix invalid placement of migrations

migrations/archive/000.397.sql

@@ -0,0 +1,9 @@
+DROP TABLE IF EXISTS external_print_products_out_of_stock;
+
+CREATE TABLE external_print_products_out_of_stock (
+    external_product_id TEXT NOT NULL,
+    region TEXT NOT NULL,
+    inserted TIMESTAMP NOT NULL DEFAULT NOW()
+);
+
+CREATE UNIQUE INDEX ON external_print_products_out_of_stock(external_product_id, region);