refactor(audit): decouple API audit classes from core via interfaces

Core code (lib/) no longer imports any MintyPHP\Module\Audit\* classes directly.
New ApiAuditServiceInterface and ApiSystemAuditReporterInterface follow the
existing pattern (interface + null implementation in core, concrete binding
from module registrar). DoctorRunner and helpers/app.php now resolve through
DI interfaces, ensuring the audit module remains fully optional.

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

lib/Console/Runner/Doctor/DoctorRunner.php

@@ -8,10 +8,10 @@ use MintyPHP\App\AppContainer;
 use MintyPHP\App\Bootstrap\EnvValidator;
 use MintyPHP\Console\Support\CliAppBootstrap;
 use MintyPHP\DB;
-use MintyPHP\Module\Audit\Service\SystemAuditService;
 use MintyPHP\Service\Access\AuthorizationService;
 use MintyPHP\Service\Access\PermissionService;
 use MintyPHP\Service\Access\UiAccessService;
+use MintyPHP\Service\Audit\AuditRecorderInterface;
 use MintyPHP\Service\Auth\AuthService;
 use Throwable;
 
@@ -283,7 +283,7 @@ final class DoctorRunner implements DoctorRunnerInterface
         $durationMs = max(0, (int) round((microtime(true) - $startedAt) * 1000));
 
         try {
-            app(SystemAuditService::class)->record(
+            app(AuditRecorderInterface::class)->record(
                 'cli.command',
                 $exitCode === 0 ? 'success' : 'failed',
                 [