feat: implement dagster and dbt validation in ci

.github/workflows/ci.yml

@@ -80,6 +80,15 @@ jobs:
       - name: Install dependencies
         run: uv sync
 
+      - name: Load environment from .env.example
+        run: grep -v '^#' .env.example | grep -v '^$' >> "$GITHUB_ENV"
+
+      - name: Generate dbt manifest
+        run: uv run dbt parse --project-dir dbt --profiles-dir dbt
+
+      - name: Validate Dagster definitions
+        run: uv run dagster definitions validate
+
       - name: Run tests with coverage
         run: uv run pytest tests/ --cov=data_platform --cov-report=json:coverage.json