feat: assert whether generated and versioned schema are identical

.github/workflows/ci.yml

@@ -20,6 +20,8 @@ jobs:
     if: github.ref == 'refs/heads/main'
     steps:
       - uses: actions/checkout@v3
-      - name: Generate schema
+      - name: Test schema
         run: |
-            cargo run
+            cargo run --release > schema.gen.json
+            # assert the generated and versioned file equal
+            diff ../schema/data-model-schema.json schema.gen.json