The best run gets registered — but the entry stores only the stage and the accuracy. Ask it the 2am questions and every answer is 'unknown': no data version, no feature version, no config. An artifact without provenance can be served but never debugged. Fix the registration to carry data ("events_2026_07"), features ("v1"), and the winning run's config.
The break is on line 4 — but read the whole snippet first.