langchain

f621c3cb - Add Tecton example to the "Connecting to a Feature Store" example notebook (#3626)

Add Tecton example to the "Connecting to a Feature Store" example notebook (#3626) This PR adds a similar example to the Feast example, using the [Tecton Feature Platform](https://www.tecton.ai/) and features from the [Tecton Fundamentals Tutorial](https://docs.tecton.ai/docs/tutorials/tecton-fundamentals).