销售通话异议证据提取器

1. 1. Prepare authorized and redacted sales-call evidence with examples/input.json as the schema.
2. Run python scripts/extract_objection_evidence.py --input examples/input.json --output examples/output.json.
3. Review evidence references, ambiguity, blockers, and human ownership before using the result.

不录音、不转写、不读取会议平台；授权未确认时直接停止，关键词命中只是复盘候选而非对客户意图的最终判断。