chore(fulfillment): cleanup old auto-generatred shipping type (#13298)

* chore(fulfillment): cleanup old auto-generatred shipping type

* changeset

* integrationt ests

* random id

* wrong code

* switch steps around

---------

Co-authored-by: Oli Juhl <59018053+olivermrbl@users.noreply.github.com>

.changeset/mighty-clocks-hide.md

@@ -0,0 +1,5 @@
+---
+"@medusajs/fulfillment": patch
+---
+
+chore(fulfillment): cleanup old auto-generatred shipping type

packages/modules/fulfillment/src/migrations/Migration20250825132614.ts

@@ -0,0 +1,43 @@
+import { Migration } from "@mikro-orm/migrations"
+import { ulid } from "ulid"
+
+export class Migration20250825132614 extends Migration {
+  override async up(): Promise<void> {
+    // 1. Find all type-code shipping option types
+    const typeCodeTypeIds = await this.execute(`
+      SELECT id FROM "shipping_option_type"
+      WHERE code = 'type-code' AND deleted_at IS NULL
+    `)
+
+    if (typeCodeTypeIds.length > 0) {
+      const defaultTypeId = `sotype_${ulid()}`
+      // 2. Create default shipping option type
+      await this.execute(`
+        INSERT INTO "shipping_option_type" (id, label, description, code)
+        VALUES ('${defaultTypeId}', 'Default', 'Default shipping option type', 'default');
+      `)
+
+      const typeIdsString = typeCodeTypeIds
+        .map((row) => `'${row.id}'`)
+        .join(",")
+
+      // 3. Reassign shipping options to the default type
+      await this.execute(`
+        UPDATE "shipping_option" 
+        SET shipping_option_type_id = '${defaultTypeId}'
+        WHERE shipping_option_type_id IN (${typeIdsString}) AND deleted_at IS NULL;
+      `)
+
+      // 4. Soft delete the old type-code types
+      await this.execute(`
+        UPDATE "shipping_option_type" 
+        SET deleted_at = now()
+        WHERE id IN (${typeIdsString});
+      `)
+    }
+  }
+
+  override async down(): Promise<void> {
+    // Not reversible: would require restoring old type-code types + reassignment
+  }
+}