Error when uniprot embeddings_manager bundle isn't available - even when profile isn't specified

[GFJHogue]

Python hits a KeyError for the default-value of this function, even when it's never called:

reactome_chatbot/src/retrievers/uniprot/rag.py

Line 18 in 8bd10c9

embeddings_directory: Path = EmbeddingEnvironment.get_dir("uniprot"),