feat(migrations): add drug (药品) archive kind template + category subtree

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

migrations/0013_drug_archive_kind.down.sql

@@ -0,0 +1,8 @@
+-- Reverse 0013: detach products from the seeded drug categories, drop the drug
+-- category subtree, and remove the drug field template.
+UPDATE product SET category_id = NULL
+WHERE category_id IN (SELECT id FROM category WHERE path <@ 'drug');
+
+DELETE FROM category WHERE path <@ 'drug';
+
+DELETE FROM kind_field WHERE kind = 'drug';