Archive old migrations (#426)

* Archive old migrations

* Fix invalid placement of migrations

migrations/archive/000.124.sql

@@ -0,0 +1,14 @@
+-- PW-1608 addresses: Split name into first name and last name
+
+BEGIN;
+    ALTER TABLE addresses
+        ADD COLUMN first_name VARCHAR,
+        ADD COLUMN last_name VARCHAR;
+
+    UPDATE addresses SET
+        first_name = left(name, strpos(name, ' ')),
+        last_name = right(name, -strpos(name, ' '));
+
+    ALTER TABLE addresses
+        DROP COLUMN name;
+COMMIT;