thomasgauvin: add changelog entry for response bodies in bulk operations

src/content/changelogs/kv.yaml

@@ -5,6 +5,21 @@ productLink: "/kv/"
 productArea: Developer platform
 productAreaLink: /workers/platform/changelog/platform/
 entries:
+  - publish_date: "2024-11-14"
+    title: Workers KV REST API bulk operations provide granular errors
+    description: |-
+
+      The REST API endpoints for bulk operations ([write](/api/operations/workers-kv-namespace-write-multiple-key-value-pairs), [delete](workers-kv-namespace-delete-multiple-key-value-pairs)) now return the keys of operations that failed during the bulk operation. The updated response bodies are documented in the [REST API documentation](/api/operations/workers-kv-namespace-list-namespaces) and contain the following information:
+
+      ```
+      {
+        "successful_key_count": number,
+        "unsuccessful_keys": string[]
+      }
+      ```
+
+      The unsuccessful keys are an array of keys that were not written successfully to all storage backends and should be retried.
+
   - publish_date: "2024-08-08"
     title: New KV Analytics API
     description: |-