[x] Change default embeddings model to text-embeddings-3-large (or large?)
[ ] Fix hardcoded warning about OpenAI api key in llm_api_handler
[x] If there's any issue with the embeddings model or provider, use the default (in-memory) database instead of chroma. This is probably on the ragdaemon side but need to test all the different cases for mentat: missing key, invalid key, broken provider...
[x] Fix context display (when auto-context, filetree is not accurate)
text-embeddings-3-large
(or large?)llm_api_handler