tests cleanup; cargo clippy fixes, minor doc updates (#177)

* Tests cleanup; cargo clippy fixes, minor doc updates
* updated label checker workflow

.github/workflows/label-checker.yaml

@@ -1,19 +1,17 @@
-name: Label Checker
-on:
-  pull_request:
-    types:
-      - opened
-      - synchronize
-      - labeled
-      - unlabeled
-
-jobs:
-
-  check_labels:
-    name: Check for  labels
-    runs-on: ubuntu-latest
-    steps:
-      - uses: docker://agilepathway/pull-request-label-checker:latest
-        with:
-          one_of: highlight,breaking-change,security-fix,enhancement,bug
-          repo_token: ${{ secrets.GITHUB_TOKEN }}
+  name: Label Checker
+  on:
+    pull_request:
+      types:
+        - opened
+        - synchronize
+        - labeled
+        - unlabeled
+  jobs:
+    check_labels:
+      name: Check for labels
+      runs-on: ubuntu-latest
+      steps:
+        - uses: docker://agilepathway/pull-request-label-checker:latest
+          with:
+            any_of: highlight,breaking-change,security-fix,enhancement,bug,cleanup-rewrite,regression-fix,codex
+            repo_token: ${{ secrets.GITHUB_TOKEN }}