refactor lot matching into shared module

internal/services/sync/service.go

@@ -322,6 +322,9 @@ func (s *Service) NeedSync() (bool, error) {
 // SyncPricelists synchronizes all active pricelists from server to local SQLite
 func (s *Service) SyncPricelists() (int, error) {
 	slog.Info("starting pricelist sync")
+	if _, err := s.EnsureReadinessForSync(); err != nil {
+		return 0, err
+	}
 
 	// Get database connection
 	mariaDB, err := s.getDB()
@@ -592,10 +595,14 @@ func (s *Service) SyncPricelistItems(localPricelistID uint) (int, error) {
 	// Convert and save locally
 	localItems := make([]localdb.LocalPricelistItem, len(serverItems))
 	for i, item := range serverItems {
+		partnumbers := make(localdb.LocalStringList, 0, len(item.Partnumbers))
+		partnumbers = append(partnumbers, item.Partnumbers...)
 		localItems[i] = localdb.LocalPricelistItem{
-			PricelistID: localPricelistID,
-			LotName:     item.LotName,
-			Price:       item.Price,
+			PricelistID:  localPricelistID,
+			LotName:      item.LotName,
+			Price:        item.Price,
+			AvailableQty: item.AvailableQty,
+			Partnumbers:  partnumbers,
 		}
 	}
 
@@ -672,6 +679,10 @@ func (s *Service) SyncPricelistsIfNeeded() error {
 
 // PushPendingChanges pushes all pending changes to the server
 func (s *Service) PushPendingChanges() (int, error) {
+	if _, err := s.EnsureReadinessForSync(); err != nil {
+		return 0, err
+	}
+
 	removed, err := s.localDB.PurgeOrphanConfigurationPendingChanges()
 	if err != nil {
 		slog.Warn("failed to purge orphan configuration pending changes", "error", err)