-- Alter existing waitlist table to add missing columns

ALTER TABLE waitlist
  ADD COLUMN IF NOT EXISTS referral_code text,
  ADD COLUMN IF NOT EXISTS invited_by    text,
  ADD COLUMN IF NOT EXISTS status        text NOT NULL DEFAULT 'pending',
  ADD COLUMN IF NOT EXISTS notes         text,
  ADD COLUMN IF NOT EXISTS name          text,
  ADD COLUMN IF NOT EXISTS updated_at    timestamptz NOT NULL DEFAULT now();

CREATE INDEX IF NOT EXISTS idx_waitlist_status ON waitlist(status);
CREATE INDEX IF NOT EXISTS idx_waitlist_created ON waitlist(created_at DESC);