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For rescue_hopeless (换走) scenario, filter out inventory candidates where totalMileage/yearTarget >= 80%. These are already near target and swapping them in adds no value. Instead, prioritize candidates with biggest mileage gaps — they benefit most from accumulating any mileage, even at a low-mileage customer. Before: showed 粤AGR6869 (93% done, 缺口 1990) as "可达标" — pointless After: shows 浙FF58720 (0% done, 缺口 60000) — genuinely needs mileage Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>