Update generated code for v1994 and 2025-09-30.preview

Author: stripe-openapi[bot]

OPENAPI_VERSION

@@ -1 +1 @@
-v1993
+v1994

test/resources/generated_examples_test.spec.js

@@ -58,6 +58,8 @@ declare module 'stripe' {
        */
       promotion_code: string | Stripe.PromotionCode | null;
 
+      source: DeletedDiscount.Source;
+
       /**
        * Date that the coupon was applied.
        */
@@ -74,6 +76,17 @@ declare module 'stripe' {
       subscription_item: string | null;
     }
 
+    namespace DeletedDiscount {
+      interface Source {
+        /**
+         * The coupon that was redeemed to create this discount.
+         */
+        coupon: string | Stripe.Coupon | null;
+
+        type: 'coupon';
+      }
+    }
+
     /**
      * A discount represents the actual application of a [coupon](https://stripe.com/docs/api#coupons) or [promotion code](https://stripe.com/docs/api#promotion_codes).
      * It contains information about when the discount began, when it will end, and what it is applied to.
@@ -138,6 +151,8 @@ declare module 'stripe' {
        */
       promotion_code: string | Stripe.PromotionCode | null;
 
+      source: Discount.Source;
+
       /**
        * Date that the coupon was applied.
        */
@@ -153,5 +168,16 @@ declare module 'stripe' {
        */
       subscription_item: string | null;
     }
+
+    namespace Discount {
+      interface Source {
+        /**
+         * The coupon that was redeemed to create this discount.
+         */
+        coupon: string | Stripe.Coupon | null;
+
+        type: 'coupon';
+      }
+    }
   }
 }