7.1 Write initial Drizzle migrations with drizzle-kit generate:pg.
7.2 Add NOT NULL, sane defaults, and composite indexes on (user_id, created_at).
7.3 Create a supabase/test project and run drizzle-kit up in CI using GitHub Actions matrix.
7.4 Document migration process in docs/db/README.md.
7.1 Write initial Drizzle migrations with drizzle-kit generate:pg.
7.2 Add NOT NULL, sane defaults, and composite indexes on (user_id, created_at).
7.3 Create a supabase/test project and run drizzle-kit up in CI using GitHub Actions matrix.
7.4 Document migration process in docs/db/README.md.