File

{
    file_id: number;
    name: string; //Max 255
    file_url: string; //Max 4000
    icon_url: string; //Max 4000
    thumbnail_url?: string; //Max 4000
    content_type: string = "text/plain";
    host: string;
    created_at: Date;

    chat_message_id?: string;
    discussion_id?: string;
    discussion_activity_id?: string;
    form_id?: string;
    record_id?: string;
}