Docs/feedback round aug (#82549)

Closes:
https://linear.app/vercel/issue/DOC-4949/clarification-redirecting-in-server-actions-to-self,
https://linear.app/vercel/issue/DOC-4973/global-error-and-global-not-found-in-prod-checklist

Additionally addresses community confusion and feedback around Server
Functions initial client side sequential processing.

Author: icyJoseph

docs/01-app/01-getting-started/08-updating-data.mdx

@@ -172,6 +172,8 @@ There are two main ways you can invoke a Server Function:
 1. [Forms](#forms) in Server and Client Components
 2. [Event Handlers](#event-handlers) and [useEffect](#useeffect) in Client Components
 
+> **Good to know:** Server Functions are designed for server-side mutations. The client currently dispatches and awaits them one at a time. This is an implementation detail and may change. If you need parallel data fetching, use [data fetching](/docs/app/getting-started/fetching-data#server-components) in Server Components, or perform parallel work inside a single Server Function or [Route Handler](/docs/app/guides/backend-for-frontend#manipulating-data).
+
 ### Forms
 
 React extends the HTML [`<form>`](https://react.dev/reference/react-dom/components/form) element to allow Server Function to be invoked with the HTML `action` prop.
@@ -355,34 +357,40 @@ export async function createPost(formData) {
 
 ### Redirecting
 
-You may want to redirect the user to a different page after performing an update. You can do this by calling [`redirect`](/docs/app/api-reference/functions/redirect) within the Server Function:
+You may want to redirect the user to a different page after performing an update. You can do this by calling [`redirect`](/docs/app/api-reference/functions/redirect) within the Server Function.
 
 ```ts filename="app/lib/actions.ts" switcher
 'use server'
 
+import { revalidatePath } from 'next/cache'
 import { redirect } from 'next/navigation'
 
 export async function createPost(formData: FormData) {
   // Update data
   // ...
 
+  revalidatePath('/posts')
   redirect('/posts')
 }
 ```
 
 ```js filename="app/actions.js" switcher
 'use server'
 
+import { revalidatePath } from 'next/cache'
 import { redirect } from 'next/navigation'
 
 export async function createPost(formData) {
   // Update data
   // ...
 
+  revalidatePath('/posts')
   redirect('/posts')
 }
 ```
 
+Calling `redirect` [throws](/docs/app/api-reference/functions/redirect#behavior) a framework handled control-flow exception. Any code after it won't execute. If you need fresh data, call [`revalidatePath`](/docs/app/api-reference/functions/revalidatePath) or [`revalidateTag`](/docs/app/api-reference/functions/revalidateTag) beforehand.
+
 ### Cookies
 
 You can `get`, `set`, and `delete` cookies inside a Server Action using the [`cookies`](/docs/app/api-reference/functions/cookies) API:

docs/01-app/02-guides/production-checklist.mdx

@@ -84,6 +84,8 @@ While building your application, we recommend using the following features to en
 <AppOnly>
 
 - **[Forms and Validation](/docs/app/guides/forms):** Use Server Actions to handle form submissions, server-side validation, and handle errors.
+- **[Global Error UI](/docs/app/api-reference/file-conventions/error#global-error):** Add `app/global-error.tsx` to provide consistent, accessible fallback UI and recovery for uncaught errors across your app.
+- **[Global 404](/docs/app/api-reference/file-conventions/not-found#global-not-foundjs-experimental):** Add `app/global-not-found.tsx` to serve an accessible 404 for unmatched routes across your app.
 
 </AppOnly>