Function mtp_pool_full_width 

pub fn mtp_pool_full_width() -> bool

2026-09-25: True when METRALE_MTP_POOL_FULL_WIDTH is present (any value, 0 included) or METRALE_EP_PROTOCOL is v2. Then mtp_state_slots is max_batch_size and verify_slot_drafts is num_drafts for every slot.