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Callback invoked when a LigTag device is detected and processed.
This callback is triggered whenever the scanner successfully detects a LigTag device in the camera feed. The LigTag object contains detection coordinates, device information, and 6DOF pose data when available.
Threading: This callback is always invoked on the main (UI) thread, making it safe to update UI elements directly.
Frequency: Called at approximately 25 FPS when devices are detected.