* Tutorial:
    * [Query Parameters and String Validations - Additional validation](https://fastapi.tiangolo.com/tutorial/query-params-str-validations/#additional-validation)
        * [Advantages of `Annotated`](https://fastapi.tiangolo.com/tutorial/query-params-str-validations/#advantages-of-annotated)

- Added `optionalOldSelf` to `x-kubernetes-validations` to support ratcheting CRD schema constraints. ([#121034](https://github.com/kubernetes/kubernetes/pull/121034), [@alexzielenski](https://github.com/alexzielenski))

// been performed.
// It doesn't return an error for rootscoped resources with namespace, because namespace should already be cleared before.
// TODO: Remove calls to this method scattered in validations of specific resources, e.g., ValidatePodUpdate.
func ValidateObjectMeta(meta *metav1.ObjectMeta, requiresNamespace bool, nameFn ValidateNameFunc, fldPath *field.Path) field.ErrorList {

- Added new `CRDValidationRatcheting` alpha feature. During a PATCH or UPDATE Validation Ratcheting discards errors thrown by unchanged portions of the resource from most OpenAPI schema validations. ([#118990](https://github.com/kubernetes/kubernetes/pull/118990), [@alexzielenski](https://github.com/alexzielenski))