Include the config the container endpoint now depends on

vv_cache_clear() went in without it, so every start and stop fatalled on the line after the
docker command had already run — the action succeeded and the page was told it failed.

Plugin/unraid/api/docker_action.php

@@ -82,12 +82,19 @@
 //                      |"Could not determine image"|"Unknown action"}
 //
 // DEPENDS ON
+//   include/config.php           vv_cache_clear()
 //   api/docker_pull_worker.php   detached worker for the pull_rebuild path
 //   docker CLI                   ps, logs, start, stop, inspect
 //   dynamix.docker.manager       rebuild_container, when present
 // ═══════════════════════════════════════════════════════════════════════════════════════════════
 header('Content-Type: application/json');
 
+// This file was self-contained until the cache invalidation below needed a shared helper, and the
+// call went in without the include. The fatal landed *after* docker stop had already run, so the
+// container went down and the page was told the action failed — the worst shape a bug here can
+// 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');
 
 $action = trim($_POST['action'] ?? '');