models + fix DTO

PF3/Models/SoundCategory.cs

@@ -0,0 +1,13 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace PF3.Models;
+
+public class SoundCategory
+{
+    [Key] public int Id { get; set; }
+
+    [Required, MaxLength(60)]
+    public string Name { get; set; } = null!;
+
+    public ICollection<Sound> Sounds { get; set; } = new List<Sound>();
+}