Object Zonal Availability Info Added

The Object schema in the storage.v1 API has been extended with a new top-level property, zonalAvailabilityInfo. This object provides details about an object's availability within Rapid Cache Ultra (RCU) zonal caches. Specifically, it includes an availableZones array, which lists the zones (e.g., 'us-central1-a') where a zonal copy of the object exists. This information will populate once the object is loaded into the cache, offering greater visibility into data locality for performance-sensitive applications.