Fix test-and-eval workflow failure by installing test dependencies

[Copilot]

The test-and-eval GitHub Actions job failed before evaluation because pytest was unavailable in CI. The workflow installed only runtime dependencies, but tests require the repository’s dev extras.

• Root cause

  • CI dependency install used pip install ., which excludes optional dev packages.
  • pytest is defined under [project.optional-dependencies].dev, so the test step failed with command not found.

• Workflow update

  • Updated .github/workflows/ci.yml to install package with dev extras in the Install dependencies step.
  • This aligns CI setup with the workflow’s actual execution path (pytest -q).

- pip install .
+ pip install ".[dev]"

[murchu27]

Updates ci.yml to properly install the dependencies it needs to run end-to-end. Specifically, it now installs pytest so that it can run unit tests. CI workflow now succeeds, so this is good to go.