(bug): Ensure Contributions\Repository handles faulty $rows values
Sentry Issue: [ENGINE-J](https://sentry.io/organizations/minds-inc/issues/1177479145/?referrer=gitlab_integration) ``` Error: Call to a member function pagingStateToken() on boolean File "/Core/Rewards/Contributions/Repository.php", line 124, in Minds\Core\Rewards\Contributions\Repository::getList 'token' => $rows->pagingStateToken() File "/Controllers/api/v2/blockchain/contributions.php", line 36, in Minds\Controllers\api\v2\blockchain\contributions::get 'offset' => $offset File "/Api/Factory.php", line 69, in Minds\Api\Factory::build return $handler->$method($pages); File "/Controllers/api/api.php", line 76, in Minds\Controllers\api\api::get return Factory::build($pages, $this->request, $this->response); File "/Core/Router.php", line 137, in Minds\Core\Router::route return $handler->$method($pages); ... (1 additional frame(s) were not displayed) ```
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