using System.ComponentModel.DataAnnotations; namespace OtaFleet.Api.Data.Entities; public class FirmwareUpdate { public int Id { get; set; } [Required] public string Version { get; set; } = string.Empty; public string? Description { get; set; } [Required] public string FilePath { get; set; } = string.Empty; public DateTime UploadedAt { get; set; } = DateTime.UtcNow; }