Fixing scale usage during inference

[JoOkuma]

No description provided.

[leonfroehlich]

Hi Jordao,
got a KeyError when running this PR because the node attributes were not added to the graph yet. Adding this snippet in ‎src/hoct/features/graph.py just before the add_edges(graph) function is called (line 201) fixed it for me:

    for column in [f"scaled_{c}" for c in cols]:
        graph.add_node_attr_key(column, pl.Float32, 0.0)

    graph.update_node_attrs(
        attrs={
            f"scaled_{c}": node_attrs[f"scaled_{c}"].to_list()
            for c in cols
        },
        node_ids=node_attrs[td.DEFAULT_ATTR_KEYS.NODE_ID].to_list(),
    )

Best,
Leon