cloud: add cloud release notes for release-20260804

tidb-cloud/releases/tidb-cloud-release-notes.md

@@ -8,6 +8,44 @@ aliases: ['/tidbcloud/supported-tidb-versions','/tidbcloud/release-notes','/ai/v
 
 This page lists the release notes of [TiDB Cloud](https://www.pingcap.com/tidb-cloud/) in 2026.
 
+## August 4, 2026
+
+**General changes**
+
+- **TiDB Cloud Essential**
+
+    - Support subscribing to alert notifications from TiDB Cloud Essential via generic webhooks.
+
+        If the [support plan](/tidb-cloud/connected-care-overview.md#connected-care) of your organization is **Enterprise** or **Premium**, you can now receive alert notifications via a generic webhook. For services that require custom payload formats, such as Telegram or Microsoft Teams, use a lightweight relay to transform and forward the notifications.
+
+        For more information, see [Subscribe via Webhook](https://docs.pingcap.com/tidbcloud/monitor-alert-webhook/?plan=essential).
+
+- **TiDB Cloud Premium**
+
+    - Support [Amazon MSK Provisioned](https://docs.aws.amazon.com/msk/latest/developerguide/msk-provisioned.html) clusters as changefeed sinks for TiDB Cloud Premium instances.
+
+        For TiDB Cloud Premium instances hosted on AWS, you can now stream row change events to Amazon MSK Provisioned clusters over AWS PrivateLink.
+
+        For more information, see [Set Up Private Endpoint for Changefeeds](/tidb-cloud/premium/set-up-sink-private-endpoint-premium.md) and [Set Up an Amazon MSK Provisioned Cluster via AWS PrivateLink](/tidb-cloud/setup-aws-msk-provisioned-private-link-service.md).
+
+    - Support subscribing to alert notifications from TiDB Cloud Premium via generic webhooks.
+
+        If the [support plan](/tidb-cloud/connected-care-overview.md#connected-care) of your organization is **Enterprise** or **Premium**, you can now receive alert notifications via a generic webhook. For services that require custom payload formats, such as Telegram or Microsoft Teams, use a lightweight relay to transform and forward the notifications.
+
+        For more information, see [Subscribe via Webhook](https://docs.pingcap.com/tidbcloud/monitor-alert-webhook/?plan=premium).
+
+- **TiDB Cloud Dedicated**
+
+    - Update pause requirements for TiDB Cloud Dedicated clusters.
+
+        Before [pausing a TiDB Cloud Dedicated cluster](/tidb-cloud/pause-or-resume-tidb-cluster.md), you must turn off [Point-in-Time Restore (PITR)](/tidb-cloud/backup-and-restore.md#turn-on-point-in-time-restore) and ensure that no Data Migration (DM) job is running. If either condition is not met, TiDB Cloud rejects the pause request and displays an error message.
+
+    - Support subscribing to alert notifications from TiDB Cloud Dedicated via generic webhooks.
+
+        If the [support plan](/tidb-cloud/connected-care-overview.md#connected-care) of your organization is **Enterprise** or **Premium**, you can now receive alert notifications via a generic webhook. For services that require custom payload formats, such as Telegram or Microsoft Teams, use a lightweight relay to transform and forward the notifications.
+
+        For more information, see [Subscribe via Webhook](https://docs.pingcap.com/tidbcloud/monitor-alert-webhook/).
+
 ## July 28, 2026
 
 **General changes**