refactor(support): complete toIntIds() rollout in tenant-area code

Final pass over tenant repositories and TenantScopeService, collapsing
the remaining two-line intval+filter and one-line intval+unique patterns
onto the shared `toIntIds()` helper. The inline pattern is now gone
from the codebase.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

core/Repository/CustomField/TenantCustomFieldOptionRepository.php

@@ -24,8 +24,7 @@ class TenantCustomFieldOptionRepository implements TenantCustomFieldOptionReposi
 
     public function listByDefinitionIds(array $definitionIds, bool $onlyActive = true): array
     {
-        $definitionIds = array_values(array_unique(array_map('intval', $definitionIds)));
-        $definitionIds = array_values(array_filter($definitionIds, static fn ($id) => $id > 0));
+        $definitionIds = toIntIds($definitionIds);
         if (!$definitionIds) {
             return [];
         }