IM/backend/IM_API/Models/Upload/UploadTask.cs

namespace IM_API.Models.Upload
{
    public class UploadTask
    {
        public Guid Id { get; set; }

        public string FileName { get; set; } = default!;
        public long FileSize { get; set; }
        public string FileHash { get; set; }
        public string ContentType { get; set; } = default!;

        public int ChunkSize { get; set; }
        public int TotalChunks { get; set; }

        public UploadStatus Status { get; set; }

        public string StorageProvider { get; set; } = default!;
        public string ObjectName { get; set; } = default!;

        public string? ProviderUploadId { get; set; } // OSS/S3 UploadId

        public DateTimeOffset CreatedAt { get; set; }
    }
}