fix(ns): root-qualify WP_* classes after PSR-4 move

Bare WP_REST_Server etc. resolve under AKSRT\* namespaces; prefix with
\ for Balance REST and other type hints / constructors.

src/AKSRT/Auth/ModerationPart1.php

@@ -130,7 +130,7 @@ trait ModerationPart1 {
         }
     }
 
-    private function resolve_result_from_runtime_or_default(array $commentdata, WP_Comment $comment): array {
+    private function resolve_result_from_runtime_or_default(array $commentdata, \WP_Comment $comment): array {
         $fp_data = $this->comment_fingerprint($commentdata);
         if ($fp_data !== '' && isset($this->moderation_result_map[$fp_data])) {
             return $this->moderation_result_map[$fp_data];