message: fix: add missing qc status to tree json
  This adds qc status to the tree json, previously missing.
  This should ensure that they QC status is shown on the tree viz as it was in Nextclade v1.
diff: @@ -104,10 +104,8 @@ fn add_child(node: &mut AuspiceTreeNode, result: &NextcladeOutputs) {
  has_pcr_primer_changes,
  pcr_primer_changes,
  missing_genes: Some(TreeNodeAttr::new(&format_failed_genes(&result.missing_genes, ", "))),
  + qc_status: Some(TreeNodeAttr::new(&result.qc.overall_status.to_string())),
  other: serde_json::Value::default(),
  -
  - // TODO
  - qc_status: None,
  },
  children: vec![],
  tmp: TreeNodeTempData::default(),
  