TTCC rung-3a — CB-expiry disaster-recovery backupCross-ad rank-loss SFT (LoRA + attn_pool + pairwise BT on all-gathered per-ad mean R_pred).
Code: github.com/cliangyu/go_viral @ branch cc/v8-cot-shift-fix (commit 80491c5)
wandb: liangyuch/ttcc run ofe4e023 ; output v1-20260603-082952
Contents: checkpoints/ (LoRA adapter + retention heads per save_steps=50), config/, eval_dumps/
