Add e2e tests for pipeline evaluation

[julian-risch]

Test eval with tiny dataset, check dataframes, isolated, integrated eval (migrate existing integration tests to e2e tests)

[wwzeng1]

Hi @julian-risch! I’m one of the founders of Sweep, a github app that solves issues by writing pull requests. This looks like a good issue for Sweep https://github.com/sweepai/sweep to try. It might need a bit more detail though. We have onboarding instructions here, I’m also happy to help you onboard directly :)