Standardize adjustment reason categories and descriptions

prisma/migrations/20260521_adjustment_reason_category_enum_description/migration.sql

@@ -0,0 +1,8 @@
+CREATE TYPE "AdjustmentReasonCategory" AS ENUM ('SHRINKAGE', 'DAMAGE', 'REGRADE', 'ADJUSTMENT');
+
+ALTER TABLE "adjustment_reasons"
+ADD COLUMN "description" VARCHAR(255);
+
+ALTER TABLE "adjustment_reasons"
+ALTER COLUMN "category" TYPE "AdjustmentReasonCategory"
+USING ("category"::"AdjustmentReasonCategory");