changes

Models/Tree.cs

@@ -0,0 +1,23 @@
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace public_valetax.Models
+{
+    [Table("trees")]
+    public class Tree
+    {
+        [Key]
+        [Column("id")]
+        public long Id { get; set; }
+
+        [Required]
+        [Column("name")]
+        public string Name { get; set; } = string.Empty;
+
+        [Column("created_at")]
+        public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+
+        // Navigation property
+        public ICollection<Node> Nodes { get; set; } = [];
+    }
+}