add warnings about direct mode

Author: james-elicx

pages/cloudflare/caching.mdx

@@ -71,6 +71,11 @@ const config: OpenNextConfig = {
 export default config;
 ```
 
+
+<Callout>
+  The `direct` mode for the queue is intended for debugging purposes and is not recommended for use in production. We are actively working on a solution that will be suitable for production.
+</Callout>
+
 #### On-Demand Revalidation
 
 The tag revalidation mechanism uses a [Cloudflare D1](https://developers.cloudflare.com/d1/) adapter as its backing store for information about tags, paths, and revalidation times.

pages/cloudflare/index.mdx

@@ -53,10 +53,12 @@ We will update the list as we progress towards releasing 1.0.
 - [x] [Image optimization](https://nextjs.org/docs/app/building-your-application/optimizing/images) (you can integrate Cloudflare Images with Next.js by following [this guide](https://developers.cloudflare.com/images/transform-images/integrate-with-frameworks/))
 - [x] [Partial Prerendering (PPR)](https://nextjs.org/docs/app/building-your-application/rendering/partial-prerendering)
 - [x] [Pages Router](https://nextjs.org/docs/pages)
-- [x] [Incremental Static Regeneration (ISR)](https://nextjs.org/docs/app/building-your-application/data-fetching/incremental-static-regeneration)
+- [x] [Incremental Static Regeneration (ISR)](https://nextjs.org/docs/app/building-your-application/data-fetching/incremental-static-regeneration) <sup>1</sup>
 - [ ] [Support for after](https://nextjs.org/blog/next-15-rc#executing-code-after-a-response-with-nextafter-experimental)
 - [ ] [Composable Caching](https://nextjs.org/blog/composable-caching) (`'use cache'`) is a Next.js 15 feature and not supported yet.
 
+<sup>1</sup> Only the `direct` mode is supported at the moment, and is not suitable for production.
+
 We welcome both contributions and feedback!
 
 ### Windows support