Steps to Reproduce:
- Open a table with an identity column (e.g., category_id in public.categories).
- Make changes and click Script Changes.
- Execute the generated script.
- Observe error: null value in column "category_id" violates not-null constraint.
Expected Behavior:
Generated script should omit identity column or use DEFAULT for insert.
Actual Behavior:
Script includes NULL for identity column, causing failure.
