- Introduced a new SQL migration script to create the `__new_message` table with updated schema, including foreign key constraints and check constraints for `role` and `status`.
- Migrated existing data from the old `message` table to the new structure and renamed the table to `message`.
- Added indexes for improved query performance on `parent_id`, `topic_id`, and `trace_id`.
- Updated metadata to reflect the new migration version and breakpoints for debugging.
