Schema can get cached without GraphQL compose contributions

I did some digging around this with version 3.x of compose.
I'm still not certain I found it.

I was booting up the plugin instances on getBaseDefinition, which can sometimes come in partially cached of bypassed if the cache in graphql was "full", which would happen if cache went a bit fucky, from incorrect server_id in the graphql validator path, or possibly from some internal GC.

- Thats the hunch anyway. so I wrote away from it.

https://git.drupalcode.org/project/graphql_compose/-/commit/ca0139f615ee...

I guess we can re-visit this once v3 goes into alpha

This might be helpful, I found a way to check if fields are missing:

  /** @var \Drupal\graphql\Entity\Server $server */
  $server = \Drupal::entityTypeManager()
    ->getStorage('graphql_server')
    ->load('graphql_compose_server');

  $query = $server->configuration()?->getSchema()?->getConfig()?->getQuery();
  $fields_to_check = [
    'route',
    'node',
   etc.
  ];
  $missing_fields = [];

  foreach ($fields_to_check as $field) {
    try {
      $query->getField($field);
    }
    catch (InvariantViolation $error) {
      if (strpos($error->getMessage(), 'Field "' . $field . '" is not defined for type "Query"') !== FALSE) {
        $missing_fields[] = $field;
      }
    }
  }