refactor: remove 13 dead code artifacts across core/

Dead methods (9):
- Command::bootstrapModuleApp() — unused by all subclasses
- SearchConfig::providerCoverageGaps() — diagnostic method, never called
- RequestInput::queryArray() — no callers
- LocaleResolver::getAvailableLocales() / getDefaultLocale() — unused getters
- EmailVerificationService::getExpiryMinutes() — constant wrapper, never called
- AuthService::loginAndRedirect() — convenience wrapper, never called
- DepartmentService::listForUserAssignments() — no callers
- UserTenantContextService::getAvailableDepartmentsByTenant() — no callers

Dead functions (3):
- navActivePublicPages(), appNormalizeStringList(), appNormalizePositiveIntList()

Dead constant (1):
- PermissionService::API_DOCS_VIEW — duplicated via other paths

Orphaned file (1):
- bin/cli-bootstrap.php — never included anywhere

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

core/Http/LocaleResolver.php

@@ -109,16 +109,6 @@ class LocaleResolver
         return in_array($locale, $this->availableLocales, true);
     }
 
-    public function getAvailableLocales(): array
-    {
-        return $this->availableLocales;
-    }
-
-    public function getDefaultLocale(): string
-    {
-        return $this->defaultLocale;
-    }
-
     private function looksLikeLocale(string $candidate): bool
     {
         return preg_match('/^[a-z]{2}(?:-[a-z]{2})?$/i', $candidate) === 1;