Find a better representation for sentence embeddings

[dhug]

https://maartengr.github.io/BERTopic/getting_started/embeddings/embeddings.html

[dhug]

TODO train a graph code bert model with a GNN message passing head on top as seen here. https://youtu.be/HRC4hZKiUWU?t=2822
https://huggingface.co/microsoft/graphcodebert-base