Error log when starting up extension

[krassowski]

Description

[E 2024-06-19 15:19:17.777 AiExtension] Unable to load embeddings model provider class from entry point `mistralai`: No module named 'langchain_mistralai'.

Reproduce

1. Create a new environment
2. pip install jupyter-ai (without [all])
3. Start jupyter lab
4. See error

Expected behavior

No errors on startup; lack of langchain_mistralai is not an error.

Context

2.17.0

[krassowski]

For reference in other cases we get a warning, which I think is fine:

[I 2024-06-19 19:04:09.899 AiExtension] Registered model provider `bedrock-chat`.
[W 2024-06-19 19:04:09.900 AiExtension] Unable to load model provider `anthropic`. Please install the `langchain_anthropic` package.
[W 2024-06-19 19:04:09.900 AiExtension] Unable to load model provider `anthropic-chat`. Please install the `langchain_anthropic` package.
[I 2024-06-19 19:04:10.493 AiExtension] Registered model provider `azure-chat-openai`.
[I 2024-06-19 19:04:10.493 AiExtension] Registered model provider `cohere`.
[W 2024-06-19 19:04:10.494 AiExtension] Unable to load model provider `gemini`. Please install the `langchain_google_genai` package.
[I 2024-06-19 19:04:10.494 AiExtension] Registered model provider `gpt4all`.
[I 2024-06-19 19:04:10.494 AiExtension] Registered model provider `huggingface_hub`.
[W 2024-06-19 19:04:10.495 AiExtension] Unable to load model provider `mistralai`. Please install the `langchain_mistralai` package.
[W 2024-06-19 19:04:10.495 AiExtension] Unable to load model provider `nvidia-chat`. Please install the `langchain_nvidia_ai_endpoints` package.

[ctcjab]

We are seeing a spurious error logged not just for mistral, but for 3 other model providers as well:

[E 2024-11-25 13:49:05.361 AiExtension] Unable to load embeddings model provider class from entry point `bedrock`: No module named 'langchain_aws'.
[E 2024-11-25 13:49:05.362 AiExtension] Unable to load embeddings model provider class from entry point `cohere`: No module named 'langchain_cohere'.
...
[E 2024-11-25 13:49:05.362 AiExtension] Unable to load embeddings model provider class from entry point `mistralai`: No module named 'langchain_mistralai'.
[E 2024-11-25 13:49:05.362 AiExtension] Unable to load embeddings model provider class from entry point `ollama`: No module named 'langchain_ollama'.

This does not just add noise to the logs that users see at startup, but worse is that it makes it harder for users to hook up meaningful alerting so that someone can get paged when (real) errors are logged by anything writing to stdout/stderr.

[ctcjab]

Submitted #1119 to address this.