- Remove all computed/derived metrics from trialRoutineEnd in both JS files:
  trialDuration, interTargetTimes, meanInterTargetRT, sdInterTargetRT,
  cvInterTargetRT, earlySegmentMeanRT, lateSegmentMeanRT, earlyLateRTRatio,
  wrongTargetHits, timeInsideTargets, timeBetweenTargets, proportionTimeBetweenTargets
- Remove in-frame tracking code (wrong-target detection, time-in/between circles)
- Remove unused global variables
- Raw data saved: cumulativetime, stimulusX/Y/Symbol, steps, trialMouse.*,
  trialType, targetHitTimes
- Add README.md: full column reference and Python snippets for all attention metrics

Co-authored-by: menzynski-biskup <116454488+menzynski-biskup@users.noreply.github.com>