MistralAI tokenizer warning persists despite setting HF_TOKEN environment variable

**When running python ingest.py:**

Despite properly setting the HF_TOKEN environment variable, the following warning still appears when running the document ingestion script:

`
/Users/somnathumapathi/my_projects/aifaq/src/mvt/venv/lib/python3.13/site-packages/langchain_mistralai/embeddings.py:181: UserWarning: Could not download mistral tokenizer from Huggingface for calculating batch sizes. Set a Huggingface token via the HF_TOKEN environment variable to download the real tokenizer. Falling back to a dummy tokenizer that uses `len()`.`