feat(BE-59,60,61): build stock transfer API with validation and audit log

- Implement CreateOne for stock transfer with multi-delivery and validation
- Preload warehouse, location, and area relations in transfer response
- Add audit log for transfer
- Improve transaction handling and error management

internal/modules/inventory/transfers/dto/transfer.dto.go

@@ -13,8 +13,8 @@ type TransferBaseDTO struct {
 	Id                   uint64              `json:"id"`
 	TransferReason       string              `json:"transfer_reason"`
 	TransferDate         string              `json:"transfer_date"`
-	SourceWarehouse      *WarehouseSimpleDTO `json:"source_warehouse,omitempty"`
-	DestinationWarehouse *WarehouseSimpleDTO `json:"destination_warehouse,omitempty"`
+	SourceWarehouse      *WarehouseDetailDTO `json:"source_warehouse,omitempty"`
+	DestinationWarehouse *WarehouseDetailDTO `json:"destination_warehouse,omitempty"`
 }
 
 // Only id and name for warehouse simple view
@@ -23,6 +23,24 @@ type WarehouseSimpleDTO struct {
 	Name string `json:"name"`
 }
 
+type AreaDTO struct {
+	Id   uint   `json:"id"`
+	Name string `json:"name"`
+}
+
+type LocationDTO struct {
+	Id   uint     `json:"id"`
+	Name string   `json:"name"`
+	Area *AreaDTO `json:"area"`
+}
+
+type WarehouseDetailDTO struct {
+	Id       uint         `json:"id"`
+	Name     string       `json:"name"`
+	Location *LocationDTO `json:"location"`
+	Area     *AreaDTO     `json:"area"`
+}
+
 type TransferListDTO struct {
 	TransferBaseDTO
 	CreatedUser *userDTO.UserBaseDTO    `json:"created_user,omitempty"`
@@ -45,7 +63,6 @@ type TransferDetailItemDTO struct {
 	Quantity       float64 `json:"quantity"`
 	BeforeQuantity float64 `json:"before_quantity"`
 	AfterQuantity  float64 `json:"after_quantity"`
-	Note           string  `json:"note"`
 }
 
 // Delivery ekspedisi
@@ -58,7 +75,6 @@ type TransferDeliveryDTO struct {
 	DocumentPath      string                    `json:"document_path"`
 	ShippingCostItem  float64                   `json:"shipping_cost_item"`
 	ShippingCostTotal float64                   `json:"shipping_cost_total"`
-	Note              string                    `json:"note"`
 	Items             []TransferDeliveryItemDTO `json:"items"`
 }
 
@@ -71,19 +87,14 @@ type TransferDeliveryItemDTO struct {
 // === Mapper Functions ===
 
 func ToTransferBaseDTO(e entity.StockTransfer) TransferBaseDTO {
-	var sourceWarehouse *WarehouseSimpleDTO
+
+	var sourceWarehouse *WarehouseDetailDTO
 	if e.FromWarehouse != nil && e.FromWarehouse.Id != 0 {
-		sourceWarehouse = &WarehouseSimpleDTO{
-			Id:   e.FromWarehouse.Id,
-			Name: e.FromWarehouse.Name,
-		}
+		sourceWarehouse = toWarehouseDetailDTO(e.FromWarehouse)
 	}
-	var destinationWarehouse *WarehouseSimpleDTO
+	var destinationWarehouse *WarehouseDetailDTO
 	if e.ToWarehouse != nil && e.ToWarehouse.Id != 0 {
-		destinationWarehouse = &WarehouseSimpleDTO{
-			Id:   e.ToWarehouse.Id,
-			Name: e.ToWarehouse.Name,
-		}
+		destinationWarehouse = toWarehouseDetailDTO(e.ToWarehouse)
 	}
 	return TransferBaseDTO{
 		Id:                   e.Id,
@@ -94,6 +105,40 @@ func ToTransferBaseDTO(e entity.StockTransfer) TransferBaseDTO {
 	}
 }
 
+func toAreaDTO(a *entity.Area) *AreaDTO {
+	if a == nil {
+		return nil
+	}
+	return &AreaDTO{
+		Id:   a.Id,
+		Name: a.Name,
+	}
+}
+
+func toLocationDTO(l *entity.Location) *LocationDTO {
+	if l == nil {
+		return nil
+	}
+	// Area selalu diisi jika l.Area ada
+	return &LocationDTO{
+		Id:   l.Id,
+		Name: l.Name,
+		Area: toAreaDTO(&l.Area),
+	}
+}
+
+func toWarehouseDetailDTO(w *entity.Warehouse) *WarehouseDetailDTO {
+	if w == nil {
+		return nil
+	}
+	return &WarehouseDetailDTO{
+		Id:       w.Id,
+		Name:     w.Name,
+		Location: toLocationDTO(w.Location),
+		Area:     toAreaDTO(&w.Area),
+	}
+}
+
 func ToTransferListDTO(e entity.StockTransfer) TransferListDTO {
 	var createdUser *userDTO.UserBaseDTO
 	if e.CreatedUser != nil {
@@ -104,12 +149,9 @@ func ToTransferListDTO(e entity.StockTransfer) TransferListDTO {
 	var details []TransferDetailItemDTO
 	for _, d := range e.Details {
 		details = append(details, TransferDetailItemDTO{
-			Id:             d.Id,
-			ProductId:      d.ProductId,
-			Quantity:       d.Quantity,
-			BeforeQuantity: d.BeforeQuantity,
-			AfterQuantity:  d.AfterQuantity,
-			Note:           d.Note,
+			Id:        d.Id,
+			ProductId: d.ProductId,
+			Quantity:  d.Quantity,
 		})
 	}
 	// Map deliveries
@@ -133,7 +175,6 @@ func ToTransferListDTO(e entity.StockTransfer) TransferListDTO {
 			DocumentPath:      del.DocumentPath,
 			ShippingCostItem:  del.ShippingCostItem,
 			ShippingCostTotal: del.ShippingCostTotal,
-			Note:              del.Note,
 			Items:             items,
 		})
 	}
@@ -160,12 +201,9 @@ func ToTransferDetailDTO(e entity.StockTransfer) TransferDetailDTO {
 	var details []TransferDetailItemDTO
 	for _, d := range e.Details {
 		details = append(details, TransferDetailItemDTO{
-			Id:             d.Id,
-			ProductId:      d.ProductId,
-			Quantity:       d.Quantity,
-			BeforeQuantity: d.BeforeQuantity,
-			AfterQuantity:  d.AfterQuantity,
-			Note:           d.Note,
+			Id:        d.Id,
+			ProductId: d.ProductId,
+			Quantity:  d.Quantity,
 		})
 	}
 	// Map deliveries
@@ -180,7 +218,6 @@ func ToTransferDetailDTO(e entity.StockTransfer) TransferDetailDTO {
 			DocumentPath:      del.DocumentPath,
 			ShippingCostItem:  del.ShippingCostItem,
 			ShippingCostTotal: del.ShippingCostTotal,
-			Note:              del.Note,
 		})
 	}
 	return TransferDetailDTO{