openai/gpt-chat-latest → B (4:1)

Side B makes a functional CI/release change by updating the npm publishing workflow for OIDC trusted publishing: it moves to Node 22, upgrades npm to a version supporting OIDC, and removes reliance on repository NPM tokens during publish steps. Side A is primarily a terminology cleanup and API renaming (e.g. `pick_random_distinct_canonical` to `pick_random_distinct_item_pair`, `canonical` to `item`), with minor documentation edits and removal of an unused helper, which has much less lasting behavioral impact.