Advanced migration using the Supabase CLI

Use the Supabase CLI (`npm install -g supabase`) to pull schema and data from your source project (`supabase db pull`, `supabase db dump`), then push to the target project (`supabase link`, `supabase db push`). This command-line approach is faster and more reliable than manual dashboard migrations, especially for large databases. Full instructions are in Supabase CLI documentation.