Prune retired task and training artifacts; retain evaluated checkpoints and repair release references

Consolidate paper experiment assets by task and run (301-450)

Consolidate paper experiment assets by task and run (1501-1582)

Consolidate paper experiment assets by task and run (1351-1500)

Consolidate paper experiment assets by task and run (901-1050)

Consolidate paper experiment assets by task and run (1-150)