close

open override fun close()

Release all resources.

Ownership

CalibraLiveEval owns the detector and closes it here
LiveEvaluator owns refDetector (duplicate) and HPCP handles, closed via destroy()
studentDetector is passed to LiveEvaluator but NOT owned by it
LiveSession is owned by CalibraLiveEval, stopped here
Player and recorder are NOT owned - caller manages their lifecycle