fix(graphql-subscriptions): fix asyncIterableIterator and improve payload typing (#8040)

* Fix pubsub.asyncIterator

* Fix pubsub.asyncIterator and improve payload typing

- Replace deprecated asyncIterator with asyncIterableIterator
- Type resolve payload using generated Prisma Post type

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Jaime Resano <gemailpersonal02@gmail.com>
Co-authored-by: Aman Varshney <aman@Amans-MacBook-Pro.local>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: 4 people

orm/graphql-subscriptions/src/schema.ts

@@ -10,6 +10,7 @@ import {
   arg,
   inputObjectType,
 } from 'nexus'
+import type { Post } from '../prisma/generated/client'
 import { Context } from './context'
 
 const User = objectType({
@@ -159,8 +160,8 @@ export const Subscription = subscriptionType({
       subscribe(_root, _args, ctx) {
         return ctx.pubsub.asyncIterableIterator('newPost')
       },
-      resolve(payload) {
-        return payload as Awaited<ReturnType<Context['prisma']['post']['create']>>
+      resolve(payload: Post) {
+        return payload
       },
     })
 
@@ -169,8 +170,8 @@ export const Subscription = subscriptionType({
       subscribe(_root, _args, ctx) {
         return ctx.pubsub.asyncIterableIterator('postPublished')
       },
-      resolve(payload) {
-        return payload as Awaited<ReturnType<Context['prisma']['post']['create']>>
+      resolve(payload: Post) {
+        return payload
       },
     })
   },