Fix up stan errors

While these foreign key toggles appear to work in tests. When testing
the same migration operations within an application the contraint error
is reproducible and not fixed still.

src/Db/Adapter/SqliteAdapter.php

@@ -1046,13 +1046,14 @@ protected function copyAndDropTmpTable(AlterInstructions $instructions, string $
                 $state['selectColumns']
             );
 
-            $foreignKeysEnabled = (bool)$this->fetchRow('PRAGMA foreign_keys')['foreign_keys'] ?? false;
+            $result = $this->fetchRow('PRAGMA foreign_keys');
+            $foreignKeysEnabled = $result ? (bool)$result['foreign_keys'] : false;
             if ($foreignKeysEnabled) {
-                // $this->execute('PRAGMA foreign_keys = OFF');
+                $this->execute('PRAGMA foreign_keys = OFF');
             }
             $this->execute(sprintf('DROP TABLE %s', $this->quoteTableName($tableName)));
             if ($foreignKeysEnabled) {
-                // $this->execute('PRAGMA foreign_keys = ON');
+                $this->execute('PRAGMA foreign_keys = ON');
             }
             $this->execute(sprintf(
                 'ALTER TABLE %s RENAME TO %s',