feat(BE): implement movement number generation and refactor transfer creation logic

internal/modules/inventory/transfers/repositories/stock_transfer.repository.go

@@ -2,6 +2,7 @@ package repositories
 
 import (
 	"context"
+	"fmt"
 
 	"gitlab.com/mbugroup/lti-api.git/internal/common/repository"
 	entity "gitlab.com/mbugroup/lti-api.git/internal/entities"
@@ -12,6 +13,7 @@ type StockTransferRepository interface {
 	repository.BaseRepository[entity.StockTransfer]
 	// get sequence for movement number
 	GetNextMovementNumber(ctx context.Context) (int64, error)
+	GenerateMovementNumber(ctx context.Context) (string, error)
 }
 
 type StockTransferRepositoryImpl struct {
@@ -32,3 +34,12 @@ func (r *StockTransferRepositoryImpl) GetNextMovementNumber(ctx context.Context)
 	}
 	return seq, nil
 }
+
+func (r *StockTransferRepositoryImpl) GenerateMovementNumber(ctx context.Context) (string, error) {
+	seq, err := r.GetNextMovementNumber(ctx)
+	if err != nil {
+		return "", err
+	}
+	movementNumber := fmt.Sprintf("ST-%05d", seq)
+	return movementNumber, nil
+}