Add pg4wp plugin and update wordpress.yaml

pg4wp/rewriters/OptimizeTableSQLRewriter.php

@@ -0,0 +1,10 @@
+<?php
+
+class OptimizeTableSQLRewriter extends AbstractSQLRewriter
+{
+    public function rewrite(): string
+    {
+        $sql = $this->original();
+        return str_replace('OPTIMIZE TABLE', 'VACUUM', $sql);
+    }
+}