Aug 7

1. 16:06

   Drop stray Jupyter checkpoint copies

   ALLIA12
   Verified signature

   9a610eb
2. 16:04

   Replace with the working dataset as graded (identifiers intact); scrubbing happens at publication via prepare_release.py

   ALLIA12
   Verified signature

   4b95eab
3. 15:59

   Intro to AI Stage 2 practical exam: 1038 dual-graded students, rubric, solutions

   ALLIA12
   Verified signature

   2c7f915