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/Service/Settings/AdminSettingsServiceSecurityTest.php

@@ -5,7 +5,7 @@ namespace MintyPHP\Tests\Service\Settings;
 use MintyPHP\Repository\Auth\ApiTokenRepository;
 use MintyPHP\Repository\Auth\RememberTokenRepository;
 use MintyPHP\Service\Access\RoleService;
-use MintyPHP\Service\Audit\SystemAuditService;
+use MintyPHP\Service\Audit\AuditRecorderInterface;
 use MintyPHP\Service\Org\DepartmentService;
 use MintyPHP\Service\Settings\AdminSettingsService;
 use MintyPHP\Service\Settings\SettingCacheService;
@@ -545,7 +545,7 @@ class AdminSettingsServiceSecurityTest extends TestCase
         $apiTokenRepository = $this->createConfiguredMock(ApiTokenRepository::class, [
             'countActive' => 0,
         ]);
-        $systemAuditService = $this->createConfiguredMock(SystemAuditService::class, [
+        $systemAuditService = $this->createConfiguredMock(AuditRecorderInterface::class, [
             'record' => null,
         ]);