two quick psalm fixes

Author: afk11

app/Http/Controllers/ValidationController.php

@@ -71,7 +71,7 @@ private function persistJobState( JobState $jobState ): void
     /**
      * Runs jobs in JobState, updating its state and persisting to cache.
      */
-    private function runValidations( ConcurrentJobRunner $runner, JobState $jobState )
+    private function runValidations( ConcurrentJobRunner $runner, JobState $jobState ): void
     {
         Log::debug( "Validation job starting", ['job_id' => $jobState->jobId]);
 

app/Utils/Grapher/MultiRrd.php

@@ -282,6 +282,8 @@ protected function loadRrdFiles(): void
      * Get the RRD file
      *
      * @throws BackendFeatureNotImplementedException
+     *
+     * @return never
      */
     public function rrd()
     {