Currently in test/format multi mode (disagg), the follower retrieves checkpoint metadata using get_complete_checkpoint(). However, the DSC PALI library version does not implement this function.

Outcome: Modify test/format so that, on every checkpoint, the leader sends the metadata to the follower (via shared memory or pipe) so it can be picked up.

Acceptance Criteria:

• Leader transmits checkpoint metadata to follower at each checkpoint.
• Follower can correctly read metadata and pick up checkpoints without calling get_complete_checkpoint().