checkpoint: 日记改格式前备份

Ariver

2026-08-25 f82d5d731f7c1439a95dda6e1a14d40d58881d69

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{
    "schemaVersion": 2,
    "targetPeriod": "2026-07",
    "updatedAt": "2026-07-15T13:14:56.838Z",
    "dates": {}
}