support and new features.
    *   **API not found.** The new optimizer has a different set of public APIs
        from the old optimizer. These API changes are mostly related to
        getting rid of slot variables and TF1 support. Please check the API
        documentation to find alternatives to the missing API. If you must

- Added CEL runtime cost calculation into CustomerResource validation. CustomerResource validation will fail if runtime cost exceeds the budget. ([#108482](https://github.com/kubernetes/kubernetes/pull/108482), [@cici37](https://github.com/cici37))

   * are guarded by a lock and operations are applied in batches to avoid lock contention. The
   * penalty of applying the batches is spread across threads so that the amortized cost is slightly
   * higher than performing just the operation without enforcing the capacity constraint.
   *
   * This implementation uses a per-segment queue to record a memento of the additions, removals,

## Changelog since v1.26.8

## Changes by Kind

### API Change

- Fixed a bug where CEL expressions in CRD validation rules would incorrectly compute a high estimated cost for functions that return strings, lists or maps.

  /**
   * Returns an unmodifiable view of the specified map entry. The {@link Entry#setValue} operation
   * throws an {@link UnsupportedOperationException}. This also has the side effect of redefining
   * {@code equals} to comply with the Entry contract, to avoid a possible nefarious implementation
   * of equals.
   *
   * @param entry the entry for which to return an unmodifiable view
   * @return an unmodifiable view of the entry
   */

  /**
   * Returns an unmodifiable view of the specified map entry. The {@link Entry#setValue} operation
   * throws an {@link UnsupportedOperationException}. This also has the side effect of redefining
   * {@code equals} to comply with the Entry contract, to avoid a possible nefarious implementation
   * of equals.
   *
   * @param entry the entry for which to return an unmodifiable view
   * @return an unmodifiable view of the entry
   */

            the filesystem if explicitly provided, then in the reactor if groupId and artifactId are provided,
            then in the default parent directory, then the local repository, and lastly in the remote repo.
            However, if the both relative path and the group ID / artifact ID are provided,
            they must match the file in the location given.

- Fixed a bug where CEL expressions in CRD validation rules would incorrectly compute a high estimated cost for functions that return strings, lists or maps.

    * This more closely aligns rest client as a generic RESTful client, while preserving the special Kube API extended error handling for the `Get` and `Into` methods (which most Kube clients use).

- The plugin mechanism functionality now closely follows the git plugin design ([#66876](https://github.com/kubernetes/kubernetes/pull/66876), [@juanvallejo](https://github.com/juanvallejo))