refactor(audit): extract audit domain into self-contained module

Move the entire audit subsystem (system audit, API audit, import audit,
user lifecycle audit, frontend telemetry) from core into modules/audit/.

Core decoupling via interface-based injection:
- AuditRecorderInterface replaces SystemAuditService in 10+ core services
- UserLifecycleAuditInterface / ImportAuditInterface for specialized flows
- NullAuditRecorder fallback when audit module is disabled
- ApiBootstrap/ApiResponse use null-safe callable resolvers

Module structure (modules/audit/):
- Manifest with routes, permissions, scheduler jobs, authorization policy
- 9 services, 8 repositories, 6 domain enums, 4 job handlers
- 33 page files, 4 JS files, 8 test files, migration scripts, i18n

Core cleanup:
- OperationsAuthorizationPolicy, UiCapabilityMap, PermissionService
  surgically cleaned of audit-specific constants
- Sidebar template cleared of hardcoded audit navigation
- AuditModuleIsolationContractTest ensures no future core→module coupling

All quality gates pass: 1346 tests (19,276 assertions), PHPStan level 5
clean, architecture contracts verified.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

lib/Support/helpers/app.php

@@ -41,16 +41,24 @@ function setAppContainer(\MintyPHP\App\AppContainer $container): void
     );
 
     \MintyPHP\Http\ApiBootstrap::configure(
-        static fn (): \MintyPHP\Service\Audit\ApiAuditService => $container->get(\MintyPHP\Service\Audit\ApiAuditService::class),
+        $container->has(\MintyPHP\Module\Audit\Service\ApiAuditService::class)
+            ? static fn () => $container->get(\MintyPHP\Module\Audit\Service\ApiAuditService::class)
+            : null,
         static fn (): \MintyPHP\Service\Settings\SettingsApiPolicyGateway => $container->get(\MintyPHP\Service\Settings\SettingsApiPolicyGateway::class),
         static fn (): \MintyPHP\Service\Security\RateLimiterService => $container->get(\MintyPHP\Service\Security\RateLimiterService::class),
-        static fn (): \MintyPHP\Http\ApiSystemAuditReporter => $container->get(\MintyPHP\Http\ApiSystemAuditReporter::class)
+        $container->has(\MintyPHP\Module\Audit\Http\ApiSystemAuditReporter::class)
+            ? static fn () => $container->get(\MintyPHP\Module\Audit\Http\ApiSystemAuditReporter::class)
+            : null
     );
 
     \MintyPHP\Http\ApiResponse::configure(
-        static fn (): \MintyPHP\Service\Audit\ApiAuditService => $container->get(\MintyPHP\Service\Audit\ApiAuditService::class),
+        $container->has(\MintyPHP\Module\Audit\Service\ApiAuditService::class)
+            ? static fn () => $container->get(\MintyPHP\Module\Audit\Service\ApiAuditService::class)
+            : null,
         static fn (): \MintyPHP\Service\Access\AuthorizationService => $container->get(\MintyPHP\Service\Access\AuthorizationService::class),
-        static fn (): \MintyPHP\Http\ApiSystemAuditReporter => $container->get(\MintyPHP\Http\ApiSystemAuditReporter::class)
+        $container->has(\MintyPHP\Module\Audit\Http\ApiSystemAuditReporter::class)
+            ? static fn () => $container->get(\MintyPHP\Module\Audit\Http\ApiSystemAuditReporter::class)
+            : null
     );
 
     \MintyPHP\Support\Guard::configure(