Important: #93765 - Extbase identity map now language-aware 

See forge#93765

Description 

The Extbase persistence session's identity map now includes language context when caching domain objects. Previously, the identity map used identifiers based only on the record's UID and localized UID, which could cause incorrect translations to be returned when the same object was accessed with different LanguageAspect configurations within the same request.

The identity map identifier now includes the language context, specifically the contentId, overlayType, and fallbackChain properties of the LanguageAspect.

Impact 

This change ensures that objects loaded with different language configurations are cached separately in the identity map. For example, if an object is first loaded with OVERLAYS_ON and then queried again with OVERLAYS_MIXED, the system will correctly return different cached objects for each context.

The change is transparent for most use cases. However, objects retrieved with different language settings are now distinct instances. Code relying on object identity (e.g., using === comparison) between objects loaded with different language settings will need adjustment.