- Fixed a 1.31 regression with API emulation versioning honors cohabitating resources. ([#127239](https://github.com/kubernetes/kubernetes/pull/127239), [@xuzhenglun](https://github.com/xuzhenglun))

- Added alpha metrics for compatibility versioning ([#131842](https://github.com/kubernetes/kubernetes/pull/131842), [@michaelasp](https://github.com/michaelasp)) [SIG API Machinery, Architecture, Instrumentation and Scheduling]

        private String id;
        private Long versionNo;
        private String eventType;
        private Map<String, Object> sourceMap;

        public TestSearchLogEvent(String id, Long versionNo, String eventType) {
            this.id = id;
            this.versionNo = versionNo;
            this.eventType = eventType;
            this.sourceMap = new HashMap<>();
        }

        for (Map<String, Object> setting : settings) {
            final Map<String, Object> requestBody = new HashMap<>(updateMap);
            requestBody.put("version_no", 1);
            final String idKey = getIdKey();
            if (setting.containsKey(idKey)) {
                requestBody.put(idKey, setting.get(idKey));
            }
            for (String key : keySet) {

- Fixes a 1.31 regression with API emulation versioning honors cohabitating resources ([#127328](https://github.com/kubernetes/kubernetes/pull/127328), [@xuzhenglun](https://github.com/xuzhenglun)) [SIG API Machinery]

        final Map<String, Object> source = toLowerHyphen(searchLogEvent.toSource());
        source.put("_id", searchLogEvent.getId());
        // source.put("version_no", searchLogEvent.getVersionNo());
        source.put("event_type", searchLogEvent.getEventType());
        return source;
    }

    /**
     * Converts a map to lower hyphen case.
     *