docs-util: fix incorrect relations in data model references + other fixes (#12487)

* fix price model incorrect relations

* fix events that don't have workflows showing

* fix notification example

www/apps/resources/references/notification/classes/notification.AbstractNotificationProviderService/page.mdx

@@ -273,11 +273,15 @@ export default async function userCreatedHandler({
   const notificationModuleService = container.resolve(
     Modules.NOTIFICATION
   )
-  const userModule = container.resolve(
-    Modules.USER
-  )
+  const query = container.resolve("query")
 
-  const user = await userModule.retrieveUser(data.id)
+  const { data: [user] } = await query.graph({
+    entity: "user",
+    fields: ["*"],
+    filters: {
+      id: data.id,
+    }
+  })
 
   await notificationModuleService.createNotifications({
     to: user.email,