-- onboarding wizard (spec 29): track current wizard step on tenants.
-- onboarding_completed already exists (home-dashboard); this adds step index only.
-- Values: 0=not started, 1=business info, 2=modules, 3=email, 4=invites, 5=complete.

ALTER TABLE tenants
  ADD COLUMN IF NOT EXISTS onboarding_step INTEGER NOT NULL DEFAULT 0;
