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    Interface SourceDocument

    interface SourceDocument {
        retrieved_at?: string;
        role: "question_pdf" | "answer_pdf" | "combined_pdf" | "metadata";
        sha256?: string;
        url: string;
        url_stable: boolean;
    }
    Index
    retrieved_at?: string

    ISO-8601 UTC instant, second precision.

    role: "question_pdf" | "answer_pdf" | "combined_pdf" | "metadata"
    sha256?: string
    url: string
    url_stable: boolean

    False when the upstream URL is known not to be a durable reference — e.g. Sachsen's document links, which expire after 15 minutes. The archived blob in the corpus is then the only retrievable copy.