enhancement: add CI step to catch changes to service artifacts (#2762)

.github/workflows/tests.yml

@@ -11,6 +11,24 @@ permissions:
   contents: read
 
 jobs:
+  verify-no-models-changes:
+    runs-on: ubuntu-20.04
+    name: Check for model changes
+    if: github.event_name == 'pull_request'
+    steps:
+      - name: Checkout codebase
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - run: |
+          BASE_REPO="${{ github.event.pull_request.base.repo.clone_url }}"
+          git fetch $BASE_REPO master:master -q
+          CHANGED_FILES=$(git diff --name-only FETCH_HEAD...HEAD -- src/data/)
+          if [ ! -z "$CHANGED_FILES" ]; then
+            echo "Changes detected in the following models:"
+            echo "$CHANGED_FILES"
+            exit 1
+          fi
   run:
     runs-on: ubuntu-20.04
     strategy: