chore: Update commitlint configuration (#818)

We no longer need to work around KeisukeYamashita/commitlint-rs#355.

Also: Add `cawg_identity` scope.

.commitlintrc.yml

@@ -20,17 +20,13 @@ rules:
   # Scope must be one of the following
   scope:
     level: error
+    optional: true
     options:
+      - c2patool
+      - cawg_identity
       - export_schema
       - make_test_images
       - sdk
-      - c2patool
-
-  # Scope may be empty
-  # (NOTE: Disabled for now while we work around
-  # https://github.com/KeisukeYamashita/commitlint-rs/issues/355.)
-  # scope-empty:
-  #   level: ignore
 
   # Subject line should exist
   subject-empty:

.github/workflows/pr_title.yml

@@ -110,11 +110,6 @@ jobs:
           echo --- commitlint results for PR title \"$PR_TITLE\" ---
           echo  
 
-          # Workaround for https://github.com/KeisukeYamashita/commitlint-rs/issues/355
-          if echo "$PR_TITLE" | grep -E "^[a-z]+\(.*\): "; then
-            echo "$PR_TITLE" | commitlint -g .commitlintrc.yml
-          else
-            echo "$PR_TITLE" | commitlint -g .commitlintrc.no-scope.yml
-          fi
+          echo "$PR_TITLE" | commitlint -g .commitlintrc.yml
 
           echo "✅ PR title matches all enforced rules."