Keep download count on Container tag overwrite (#20728) (#20735)

Co-authored-by: 6543 <6543@obermui.de>

routers/api/packages/container/manifest.go

@@ -312,6 +312,9 @@ func createPackageAndVersion(ctx context.Context, mci *manifestCreationInfo, met
 				return nil, err
 			}
 
+			// keep download count on overwrite
+			_pv.DownloadCount = pv.DownloadCount
+
 			if pv, err = packages_model.GetOrInsertVersion(ctx, _pv); err != nil {
 				log.Error("Error inserting package: %v", err)
 				return nil, err