[Dashboard] Fulfillment customFields still broken in 3.6.1 despite PR #4386 fix

[Doulami]

Here's the complete issue body to paste:

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Hi!

Firstly, thanks for your work on this project!

Today I used patch-package to patch @vendure/dashboard@3.6.1 for the project I'm working on.

The Problem

When custom fields are defined on the Fulfillment entity, the dashboard's ModifyOrder mutation fails with:

GraphQL Request Error: Field "customFields" of type "FulfillmentCustomFields" must have a selection of subfields. Did you mean "customFields { ... }"?

The built-in fulfillmentFragment has a bare customFields without subfield selection. The addCustomFields() function only injects subfields into top-level fragments, but Fulfillment is a nested fragment (used inside OrderDetail), so it doesn't get processed.

Steps to reproduce:

1. Define custom fields on Fulfillment entity in a plugin
2. Go to an order with fulfillments in the dashboard
3. Click "Modify" → "Preview changes"
4. Error appears

Here is the diff that solved my problem:

diff --git a/node_modules/@vendure/dashboard/src/app/routes/_authenticated/_orders/orders.graphql.ts b/node_modules/@vendure/dashboard/src/app/routes/_authenticated/_orders/orders.graphql.ts
index f396081..9fce543 100644
--- a/node_modules/@vendure/dashboard/src/app/routes/_authenticated/_orders/orders.graphql.ts
+++ b/node_modules/@vendure/dashboard/src/app/routes/_authenticated/_orders/orders.graphql.ts
@@ -97,7 +97,18 @@ export const fulfillmentFragment = graphql(`
             quantity
         }
         trackingCode
-        customFields
+        customFields {
+            afexBarcode
+            actualCarrierUsed
+            originalShippingMethod
+            afexZones
+            carrierCode
+            wavesoftCode
+            manifestedAt
+            numberOfPackages
+            serviceType

<img width="1239" height="799" alt="Image" src="https://github.com/user-attachments/assets/b093536a-bb53-4eff-bb1f-0adc29d400a0" />

<img width="609" height="924" alt="Image" src="https://github.com/user-attachments/assets/405b6d65-bc99-4ba4-9cca-67f326bb545c" />
<img width="1239" height="799" alt="Image" src="https://github.com/user-attachments/assets/24f5116c-1258-492d-8219-50f10abf4c4e" />

+        }
     }
 `);

Suggested fix: Either update addCustomFields() to process nested fragments like Fulfillment, or add Fulfillment to includeNestedFragments when building order-related queries.

This issue body was partially generated by patch-package.

Note: I see PR #4386 already added 'Fulfillment' to includeNestedFragments in multiple loaders, but the issue persists in 3.6.1. The addCustomFields() transformation doesn't seem to be working for nested fragments even with this setting.

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Submit at: https://github.com/vendure-ecommerce/vendure/issues/new