CREATE TABLE recipe_views (
  profile_id INTEGER NOT NULL REFERENCES profile(id) ON DELETE CASCADE,
  recipe_id INTEGER NOT NULL REFERENCES recipe(id) ON DELETE CASCADE,
  last_viewed_at TEXT NOT NULL DEFAULT (datetime('now')),
  PRIMARY KEY (profile_id, recipe_id)
);
CREATE INDEX idx_recipe_views_recent
  ON recipe_views (profile_id, last_viewed_at DESC);