CREATE TABLE IF NOT EXISTS staff_schedules (
  id          UUID        PRIMARY KEY DEFAULT gen_random_uuid(),
  hotel_id    UUID        NOT NULL REFERENCES hotels(id) ON DELETE CASCADE,
  user_id     UUID        NOT NULL REFERENCES users(id) ON DELETE CASCADE,
  date        DATE        NOT NULL,
  shift_start TIME,
  shift_end   TIME,
  is_day_off  BOOLEAN     NOT NULL DEFAULT false,
  notes       TEXT,
  created_at  TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_at  TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  UNIQUE(hotel_id, user_id, date)
);