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  "content": "{\n  \"invoices\": [\n    {\n      \"email_id\": \"E01\",\n      \"message_id\": \"msg-a\",\n      \"invoice_id\": \"INV-100\",\n      \"supplier\": \"松风材料社\",\n      \"buyer\": \"青禾工作室\",\n      \"issue_date\": \"2026-10-20\",\n      \"currency\": \"CNY\",\n      \"subtotal\": 100.00,\n      \"tax\": 0.00,\n      \"total\": 100.00,\n      \"attachment_hash\": \"demo-a\",\n      \"review_reasons\": []\n    },\n    {\n      \"email_id\": \"E03\",\n      \"message_id\": \"msg-b\",\n      \"invoice_id\": \"INV-101\",\n      \"supplier\": \"松风材料社\",\n      \"buyer\": \"青禾工作室\",\n      \"issue_date\": \"2026-10-21\",\n      \"currency\": \"CNY\",\n      \"subtotal\": 80.00,\n      \"tax\": null,\n      \"total\": 80.00,\n      \"attachment_hash\": \"demo-b\",\n      \"review_reasons\": []\n    },\n    {\n      \"email_id\": \"E04\",\n      \"message_id\": \"msg-c\",\n      \"invoice_id\": \"INV-102\",\n      \"supplier\": \"北门纸品社\",\n      \"buyer\": \"青禾工作室\",\n      \"issue_date\": \"2026-10-22\",\n      \"currency\": \"CNY\",\n      \"subtotal\": 60.00,\n      \"tax\": 6.00,\n      \"total\": 68.00,\n      \"attachment_hash\": \"demo-c\",\n      \"review_reasons\": [\n        \"Total conflicts with sum of subtotal and tax\"\n      ]\n    }\n  ]\n}"
}