6.5.12

• Made IterableDataRegion an @objc class for better Objective-C compatibility.
• Improved robustness of the SDK by adding more internal initialization checks before executing certain operations.
• Enhanced thread safety for embedded message data handling, leading to increased stability.
• Improved IterableEmbeddedView by making imgView and cardImageView optional, leading to more robust view handling, particularly for .card and .banner types when images might not be present.
• Minor refinements to authentication and token refresh logic for increased stability.