added a failed status when empty mosaic is create;

laravel_app/app/Jobs/ProjectMosiacGeneratorJob.php

@@ -65,6 +65,7 @@ public function handle(): void
                 ->env(['PATH' => $currentPath.':/usr/local/Cellar/pandoc/3.1.8/bin/pandoc'])
                 ->start($command, function (string $type, string $output) use ($project) {
                     ProjectLogger::log($project, $output);
+                    $this->throwIfOutputContainsError($output);
                 });
             $results = $process->wait();
             if ($results->successful()) {
@@ -112,4 +113,12 @@ public static function handleFor(Project $project, Carbon $endDate, int $offset)
             ]);
         return new self($mosaic);
     }
+
+    private function throwIfOutputContainsError(string $output)
+    {
+        if (str_contains($output, 'No images available this week, empty mosaic created')) {
+            throw new \RuntimeException( $output);
+        }
+        return true;
+    }
 }