text: 
  -- +migrate Up
  DROP TABLE throttle;
  -- +migrate Down
  CREATE TABLE throttle (
      action enum_throttle_type NOT NULL,
      client_id uuid,
      last_action_time timestamp with time zone DEFAULT now() NOT NULL
  );
  
  ALTER TABLE ONLY throttle
      ADD CONSTRAINT throttle_pkey PRIMARY KEY (action);
  
  INSERT INTO throttle (action)
  VALUES ('notifications');
  