Specifies full checkout for CircleCI

Ensures that the CircleCI job performs a full checkout of the repository.

This prevents potential issues caused by shallow clones, where only the most recent commit is checked out, potentially missing necessary history.

Author: paulcruse3

.circleci/config.yml

@@ -50,7 +50,8 @@ jobs:
         docker:
             - image: cimg/python:3.9
         steps:
-            - checkout
+            - checkout:
+                method: full
             - python-test-install
             - setup-artifacts
             - python-lint