namespace QuantEngine.Core.Models { public class WorkspaceSession { public string SessionTokenHash { get; set; } = string.Empty; public string Username { get; set; } = string.Empty; public string Role { get; set; } = "Admin"; public string CreatedAt { get; set; } = string.Empty; public string ExpiresAt { get; set; } = string.Empty; public string? RevokedAt { get; set; } } }