Update DeMemWM validation metrics and launchers

Fix curriculum auto-resume stage handoff

Add DeMemWM curriculum training support

Reject stale DeMemWM experiment flags

Fix DeMemWM checkpoint load priority

Harden DeMemWM checkpoint loading

Add DeMemWM step 1-4 dataset scaffold

Keep reproduction train and eval fixes

update evaluation and fix psnr

fix oasis loading bug

Update exp_base.py

Update exp_base.py

add experiments