hub: add deletion note (#24078)

<!--Delete sections as needed -->

## Description

Delete operation may time-out. Hub automatically retries without user
interaction in both the UI and API.

Added notes to make the user aware.

## Related issues or tickets

ENGDOCS-3173

## Reviews

<!-- Notes for reviewers here -->
<!-- List applicable reviews (optionally @tag reviewers) -->

- [ ] Technical review
- [ ] Editorial review
- [ ] Product review

---------

Signed-off-by: Craig Osterhout <craig.osterhout@docker.com>

Author: craig-osterhout

content/manuals/docker-hub/repos/manage/hub-images/manage.md

@@ -26,6 +26,10 @@ The following objects are shown in the diagram.
 
 ## Manage repository images and image indexes
 
+Use the following steps to delete one or more items via the graphical user
+interface. To delete in bulk, see the [deletion API
+endpoint](/reference/api/registry/latest/#tag/delete).
+
 1. Sign in to [Docker Hub](https://hub.docker.com).
 2. Select **My Hub** > **Repositories**.
 3. In the list, select a repository.
@@ -51,7 +55,9 @@ The following objects are shown in the diagram.
       amount of storage you will reclaim.
    4. Select **Delete forever**.
 
-  
    > [!NOTE]
    >
-   > If you would like to delete in bulk, you can use the [deletion API endpoint](/reference/api/registry/latest/#tag/delete).
+   > Deletion operations may take some time to complete. Timeout errors may
+   > occur during the deletion process. The system automatically retries the
+   > deletion in the background, and the items will be removed without requiring
+   > any action from you.

content/reference/api/registry/latest.yaml

@@ -200,6 +200,10 @@ tags:
 
       Only untagged manifests (or those not referenced by other tags or images) can be deleted. If a manifest is still referenced, the registry returns `403 Forbidden`.
 
+      > **Note**
+      >
+      > Manifest deletion operations may experience latency and could return a `500 Internal Server Error` during deletion. The system automatically retries the deletion in the background, so the manifest will eventually be removed. You do not need to manually retry the request.
+
       This section outlines the basic steps to delete an image using the registry API.
 
       1. [Get a bearer token for the repository](https://docs.docker.com/reference/api/registry/auth/).
@@ -657,6 +661,10 @@ paths:
         Only untagged or unreferenced manifests can be deleted. If the manifest is still referenced by a tag or another image, the registry will return `403 Forbidden`.
 
         This operation requires `delete` access to the repository.
+
+        > **Note**
+        >
+        > Manifest deletion operations may take some time and could return a `500 Internal Server Error`. The system automatically retries the deletion in the background. Manual intervention is not required.
       parameters:
         - name: name
           in: path