Fix : Replace req.user.customer_id with req.auth_context.actor_id in …

…store/products APIs

- Use auth_context.actor_id to retrieve customer_id instead of req.user.customer_id
- Ensure consistency with AuthenticatedMedusaRequest type
- Resolve issue medusajs#9819

packages/medusa/src/api/utils/middlewares/products/set-pricing-context.ts

@@ -44,7 +44,7 @@ export function setPricingContext() {
     if (req.user?.customer_id) {
       const customerGroups = await refetchEntities(
         "customer_group",
-        { customer_id: req.user?.customer_id },
+        { customer_id: req.auth_context?.actor_id },
         req.scope,
         ["id"]
       )