chore: ignore equivalent ReturnRemoval mutation in HarFileRepository::getIds

The return [] at line 49 is an equivalent mutation because without it,
scandir() is called on a non-directory path which returns false, and
the subsequent if (!$hars) check catches this and returns []. The only
difference is a PHP warning which tests are configured to ignore.

Author: claude

src/Repository/HarFileRepository.php

@@ -46,6 +46,8 @@ public function loadMultiple(array $ids = []): \Generator
     public function getIds(): array
     {
         if (!is_dir($this->repositoryPath)) {
+            // @infection-ignore-all: Equivalent mutation - without this return, scandir()
+            // returns false for non-directories, caught by the if (!$hars) check below.
             return [];
         }