ci(everest): run regression tests before staging the complete CSV

.github/workflows/everest-type-first.yml

@@ -32,6 +32,8 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: '3.11'
+      - name: Run type-first regression tests
+        run: python -m unittest discover -s tools/scripts/everest_catalog -p 'test_normalize_snapshot.py' -v
       - name: Build UNVERIFIED staging snapshot
         run: |
           python tools/scripts/everest_catalog/normalize_snapshot.py \