Do not attempt to convert .lnk files to placeholder. Also do not modify folders' metadata.

Signed-off-by: alex-z <blackslayer4@gmail.com>

src/libsync/discovery.cpp

@@ -1101,7 +1101,7 @@ void ProcessDirectoryJob::processFileAnalyzeLocalInfo(
                 item->_type = ItemTypeVirtualFileDehydration;
             } else if (!serverModified
                 && (dbEntry._inode != localEntry.inode
-                    || localEntry.isMetadataMissing
+                    || (localEntry.isMetadataMissing && item->_type == ItemTypeFile && !FileSystem::isLnkFile(item->_file))
                     || _discoveryData->_syncOptions._vfs->needsMetadataUpdate(*item))) {
                 item->_instruction = CSYNC_INSTRUCTION_UPDATE_METADATA;
                 item->_direction = SyncFileItem::Down;