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        "id": 1,
        "from": "client",
        "text": "SLM FRERE ST1 +ETHANOL",
        "file_url": "",
        "timestamp": "2026-05-11T12:42:09+02:00"
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        "text": "en cours ...",
        "file_url": "",
        "timestamp": "2026-05-11T13:19:24+02:00"
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        "from": "admin",
        "text": "stage 1  flexfuel e85",
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        "timestamp": "2026-05-11T13:23:01+02:00"
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]