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>

tests/Unit/Module/ModuleEventDispatcherTest.php

@@ -6,7 +6,7 @@ use MintyPHP\App\AppContainer;
 use MintyPHP\App\Module\Contracts\EventListener;
 use MintyPHP\App\Module\ModuleEventDispatcher;
 use MintyPHP\Http\RequestContext;
-use MintyPHP\Service\Audit\SystemAuditService;
+use MintyPHP\Service\Audit\AuditRecorderInterface;
 use PHPUnit\Framework\TestCase;
 
 final class ModuleEventDispatcherTest extends TestCase
@@ -119,7 +119,7 @@ final class ModuleEventDispatcherTest extends TestCase
         $container = new AppContainer();
         $container->set($failingListener::class, static fn () => $failingListener);
 
-        $systemAuditService = $this->createMock(SystemAuditService::class);
+        $systemAuditService = $this->createMock(AuditRecorderInterface::class);
         $systemAuditService->expects($this->once())
             ->method('record')
             ->with(