wip: fix export v2 ignoring metadata ID

augur/export_v2.py

@@ -1016,11 +1016,11 @@ def parse_node_data_and_metadata(T, node_data, metadata):
     node_attrs = {clade.name: {} for clade in T.root.find_clades()}
 
     # first pass: metadata
-    for node in metadata.values():
-        if node["strain"] in node_attrs: # i.e. this node name is in the tree
+    for metadata_id, node in metadata.items():
+        if metadata_id in node_attrs: # i.e. this node name is in the tree
             for key, value in node.items():
                 corrected_key = update_deprecated_names(key)
-                node_attrs[node["strain"]][corrected_key] = value
+                node_attrs[metadata_id][corrected_key] = value
                 metadata_names.add(corrected_key)
 
     # second pass: node data JSONs (overwrites keys of same name found in metadata)