Rewrote importer to be more clean about the stage it is in.

app/Repositories/ImportJob/ImportJobRepositoryInterface.php

@@ -38,6 +38,15 @@ interface ImportJobRepositoryInterface
      */
     public function create(string $type): ImportJob;
 
+    /**
+     * Return import file content.
+     *
+     * @param ImportJob $job
+     *
+     * @return string
+     */
+    public function uploadFileContents(ImportJob $job): string;
+
     /**
      * @param string $key
      *