Why the quarter may be the most important in its history.Rivian's (RIVN -5.23%) second quarter could go down as the most important in its history after the electric vehicle (EV) maker introduced its next-generation vehicle platform and struck a partnership with Volkswagen Group (OTC: VWAGY). However, those important events happened toward the end of the quarter and did not have a major impact on its Q2 results.Let's take a look at Rivian's most recent quarterly results and why the company appears to be read ...