openai/gpt-chat-latest → A (8:1)

Side A fixes a real correctness bug by moving the zero-ratio early return before `ensure_item` and `voted_pairs.insert`, preventing ghost items and incorrectly marked voted pairs. It also updates the test to verify that no items, edges, or voted pairs are registered, whereas Side B is a large architectural reconfiguration with broad feature changes but no clearly demonstrated targeted bug fix or validated lasting correctness improvement in the patch itself.