chore: perauset customer project

sql/0012-inventory-categories.sql

@@ -0,0 +1,6 @@
+-- Add category (enum) and subcategory (free text) to inventory items
+ALTER TABLE app.inventory_item
+  ADD COLUMN category TEXT NOT NULL DEFAULT 'operations',
+  ADD COLUMN subcategory TEXT;
+
+CREATE INDEX idx_inventory_item_category ON app.inventory_item(category);