chore(ci): add MongoDB service to tests job

Author: polyipseity

.github/workflows/check-shared-steps.yml

@@ -59,6 +59,10 @@ jobs:
         with:
           node-version: 24
 
+      - uses: supercharge/mongodb-github-action@1.11.0
+        with:
+          mongodb-version: 7
+
       - run: |
           corepack enable
           corepack install