message: feat: remove "QC Flags" from tree node info
  Note that this affects the output tree JSON.
diff: @@ -267,8 +267,6 @@ namespace Nextclade {
  newNode.setNodeAttr("QC Status", formatQcStatus(result.qc.overallStatus));
  - newNode.setNodeAttr("QC Flags", formatQcFlags(result.qc));
  -
  auto tempMutations = node.mutations();
  for (const auto& mutStr : nucMutations) {
  // TODO: This parsing seems redundant. Can we avoid converting these to strings in upstream code?
  