using MongoDB.Bson; using MongoDB.Bson.Serialization.Attributes; namespace QuestionsApi.Models; public class QuestionMediaAsset { [BsonId] [BsonRepresentation(BsonType.ObjectId)] public string? Id { get; set; } public string FileName { get; set; } = ""; public string ContentType { get; set; } = ""; public byte[] Bytes { get; set; } = []; public DateTime CreatedUtc { get; set; } = DateTime.UtcNow; }