- Introduced a structured and versioned `v1alpha1` response for the `statusz` endpoint. ([#134313](https://github.com/kubernetes/kubernetes/pull/134313), [@richabanker](https://github.com/richabanker)) [SIG API Machinery, Architecture, Instrumentation, Network, Node, Scheduling and Testing]

- The synthetic "Bookmark" event for the watch stream requests will now include a new annotation: `kubernetes.io/initial-events-list-blueprint`. THe annotation contains an empty, versioned list that is encoded in the requested format (such as protobuf, JSON, or CBOR), then base64-encoded and stored as a string. ([#127587](https://github.com/kubernetes/kubernetes/pull/127587), [@p0lyn0mial](https://github.com/p0lyn0mial)) [SIG API Machinery]...