stock_ledger completed need to test

Distribution/Models/Category.cs

@@ -4,5 +4,6 @@ namespace Distribution.Models
     {
         public string Name { get; set; }
         public int? ExternalErpId { get; set; }
+        public bool AllowCustomerReturn { get; set; } = false;
     }
 }

Distribution/Models/Enums.cs

@@ -0,0 +1,13 @@
+namespace Distribution.Models
+{
+    public enum LocationType { Warehouse, Vehicle }
+
+    public enum MovementType
+    {
+        Sale,
+        CustomerReturn,
+        Transfer,
+        Damage,
+        Adjustment
+    }
+}

Distribution/Models/StockBalance.cs

@@ -0,0 +1,19 @@
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Distribution.Models
+{
+    public class StockBalance
+    {
+        public Guid Id { get; set; } = Guid.NewGuid();
+
+        public Guid FK_ItemId { get; set; }
+        [ForeignKey("FK_ItemId")]
+        public Item Item { get; set; }
+
+        public Guid LocationId { get; set; }
+        public LocationType LocationType { get; set; }
+
+        public decimal Quantity { get; set; }
+        public DateTime UpdatedAt { get; set; } = DateTime.Now;
+    }
+}

Distribution/Models/StockMovement.cs

@@ -0,0 +1,28 @@
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Distribution.Models
+{
+    public class StockMovement
+    {
+        public Guid Id { get; set; } = Guid.NewGuid();
+
+        public Guid FK_ItemId { get; set; }
+        [ForeignKey("FK_ItemId")]
+        public Item Item { get; set; }
+
+        public Guid? FromLocationId { get; set; }
+        public LocationType? FromLocationType { get; set; }
+
+        public Guid? ToLocationId { get; set; }
+        public LocationType? ToLocationType { get; set; }
+
+        public decimal Quantity { get; set; }
+        public MovementType Type { get; set; }
+
+        public string? ReasonCode { get; set; }
+        public Guid? ReferenceId { get; set; }
+
+        public DateTime CreatedAt { get; set; } = DateTime.Now;
+        public Guid CreatedBy { get; set; }
+    }
+}