Fix adjusment stock chickin, transfer to laying and chickin

internal/common/service/fifo_stock_v2/allocate.go

@@ -141,6 +141,9 @@ func (s *fifoStockV2Service) allocateInternal(ctx context.Context, tx *gorm.DB,
 		if remaining <= 0 {
 			break
 		}
+		if shouldSkipStockableForUsable(req, lot.Ref.LegacyTypeKey) {
+			continue
+		}
 		if lot.AvailableQuantity <= 0 {
 			continue
 		}
@@ -207,6 +210,20 @@ func (s *fifoStockV2Service) allocateInternal(ctx context.Context, tx *gorm.DB,
 	return result, nil
 }
 
+func shouldSkipStockableForUsable(req AllocateRequest, stockableType string) bool {
+	usableType := strings.ToUpper(strings.TrimSpace(req.Usable.LegacyTypeKey))
+	functionCode := strings.ToUpper(strings.TrimSpace(req.Usable.FunctionCode))
+	stockable := strings.ToUpper(strings.TrimSpace(stockableType))
+
+	// CHICKIN_OUT must consume physical stock sources, not population lots,
+	// otherwise approved chickin can consume its own just-created population.
+	if (usableType == "PROJECT_CHICKIN" || functionCode == "CHICKIN_OUT") && stockable == "PROJECT_FLOCK_POPULATION" {
+		return true
+	}
+
+	return false
+}
+
 func (s *fifoStockV2Service) Rollback(ctx context.Context, req RollbackRequest) (*RollbackResult, error) {
 	if err := s.validateRollbackRequest(req); err != nil {
 		return nil, err