Archive old migrations (#426)

* Archive old migrations

* Fix invalid placement of migrations

migrations/archive/000.404.sql

@@ -0,0 +1,6 @@
+-- Delete incorrect redirects
+
+delete from redirects where source_uri like 'clouds-in-may-%';
+delete from redirects where source_uri like 'dream-odyssey-%';
+delete from redirects where source_uri like 'release-%';
+delete from redirects where source_uri like 'summer-haze-%';