CREATE TABLE IF NOT EXISTS play_history (
  id TEXT PRIMARY KEY,
  user_id TEXT NOT NULL,
  track_id TEXT NOT NULL,
  event_type TEXT NOT NULL,
  played_at TEXT NOT NULL,
  client_name TEXT,
  submission INTEGER NOT NULL DEFAULT 0
);

CREATE INDEX IF NOT EXISTS idx_play_history_user_played_at ON play_history(user_id, played_at DESC);
CREATE INDEX IF NOT EXISTS idx_play_history_track_played_at ON play_history(track_id, played_at DESC);