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## Version 5.1.0

* Added challenge presentation modes (full screen, top, bottom, and center); on Android, challenge lifecycle handling now uses onPause/onResume only instead of also dismissing on onStop, so overlay presentations remain visible while the host activity is paused or covered.
* Bot Defender: added a `solvedWithError` challenge outcome when the user completes a challenge but the SDK cannot finalize the session token.
* Doctor App v2: new and improved UX for integration verification and testing.
* Added a public SDK logger for integration diagnostics.
* Deprecated the single-argument `handleBlockResponse` callback in favor of `handleBlockResponseWithReason`.
* Bug fixes and improvements.