Refactor sales pipeline: ShopPO, Invoice, SysConfig models

Major refactor replacing Sale/Order with ShopPO → Invoice → LoadingSheet flow. Removed legacy Sale/Order models and features; introduced ShopPO, ShopPOItem, Invoice, LoadingSheetOrder, and SysConfig models. Updated related entities, enums, repositories, and controllers. Added new migrations for schema changes and system config. Overhauled business logic and DI registrations. Updated documentation with migration plan.

Distribution/Models/DeliveryRun.cs

@@ -4,8 +4,7 @@ namespace Distribution.Models
 {
     public class DeliveryRun : Template
     {
-        public RideType RideType { get; set; }
-        public RideStatus Status { get; set; } = RideStatus.Draft;
+        public RideStatus Status { get; set; } = RideStatus.Open;
 
         public Guid FK_VehicleId { get; set; }
         [ForeignKey("FK_VehicleId")]
@@ -15,19 +14,10 @@ namespace Distribution.Models
         [ForeignKey("FK_DriverProfileId")]
         public DriverProfile DriverProfile { get; set; }
 
-        public Guid FK_RouteId { get; set; }
-        [ForeignKey("FK_RouteId")]
-        public Route Route { get; set; }
-
-        public Guid FK_SourceWarehouseId { get; set; }
-        [ForeignKey("FK_SourceWarehouseId")]
-        public Warehouse SourceWarehouse { get; set; }
-
         public int Meterstart { get; set; }
         public int Meterend { get; set; }
 
         public DateTime? StartedAt { get; set; }
-        public DateTime? ActivatedAt { get; set; }
         public DateTime? ClosedAt { get; set; }
     }
 }