Add .circleci/config.yml

[chelseatroy]

Goal(s) of this Pull Request:

• Get started on CircleCI in our repository! This CircleCI build:

1. installs dependencies (with caching for speed)
2. Runs the unit tests
3. Runs the linter

@Dexterp37 getting integration tests to work here is possible but more involved, requiring collaboration with SRE to get a service account to reference in the build. So I'm making that a separate ticket.

Acceptance criteria:

In order to approve, reviewer must be able to...

• When one opens a new branch, the CircleCI script should run there.

[Dexterp37]

Thanks for this work. Solid starting point, I'd love to see us enable the the formatting check (since we have that available) so that we catch these problems too before merge.

[Dexterp37]

Would you please add the format check as well? Should be poetry run ruff format --check (see here)

[chelseatroy]

Done!

[Dexterp37]

Please add a reference to the ticket for working on this :) e.g. something like "# To be addressed in XXX"

[chelseatroy]

Done!

[Dexterp37]

Perfection!