The best (winning) model surfaced, if any iteration produced one.
The durable MJ: Experiments definition.
All MJ: Experiment Session Iterations created during the run.
The final leaderboard, best-first.
The MJ: Experiment Sessions row executed (Completed or Paused).
Why the session stopped (completed vs. a clean budget pause).
The result of ExperimentOrchestrator.runSession — the durable Experiment, the executed Session, the iterations created, the final leaderboard, the best model surfaced, and how/why the session stopped.