Each series win, each perfectly executed managerial move by Buck Showalter, each test that they pass against the game’s best teams continues to give credence to an idea that has been very foreign to their fans for years. These Mets are built not to collapse. Every season is different from the last, of course. New players come in and out, factors around the league change, but still the Mets have found a way to turn magnificent starts into late-season heartbreak. In 2021, 2012, 2009, 2007, 1998 and 1997, the club won at least 31 of their first 56 games. None of those teams ended up in the playof…