Put every tmpfs path in one place both layers can read

Plugin/unraid/api/docker_action.php

@@ -95,7 +95,9 @@ header('Content-Type: application/json');
 // take, because the operator's next move is to try again on a machine that already did it.
 require_once dirname(__DIR__) . '/include/config.php';
 
-define('VV_JOB_DIR', '/tmp/varaverk_dk_jobs');
+// VV_JOB_DIR is defined in config.php with every other tmpfs path, read from DOCKER_JOB_DIR in
+// master.conf. It was declared here, inside an endpoint, which is why a survey of Varaverk's
+// cache and job directories missed it entirely.
 
 $action = trim($_POST['action'] ?? '');
 $name   = trim($_POST['name']   ?? '');