ALTER TABLE organizations
  ADD COLUMN IF NOT EXISTS automation_enabled boolean NOT NULL DEFAULT false;

ALTER TABLE tasks
  ADD COLUMN IF NOT EXISTS confirmation_mode text NOT NULL DEFAULT 'manual';

ALTER TABLE tasks
  DROP CONSTRAINT IF EXISTS tasks_confirmation_mode_check;

ALTER TABLE tasks
  ADD CONSTRAINT tasks_confirmation_mode_check
  CHECK (confirmation_mode IN ('manual', 'automatic'));

CREATE INDEX IF NOT EXISTS tasks_confirmation_mode_idx
  ON tasks (organization_id, confirmation_mode, created_at DESC);