Archive old migrations (#426)

* Archive old migrations

* Fix invalid placement of migrations

migrations/archive/000.189.sql

@@ -0,0 +1,7 @@
+-- P5-5239: add slug to collections
+
+ALTER TABLE collections_texts
+    ADD COLUMN slug TEXT;
+
+
+ALTER TABLE collections_texts ADD CONSTRAINT unique_slug UNIQUE (market_id, slug);