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/Import/ImportServiceTest.php

@@ -4,7 +4,7 @@ namespace MintyPHP\Tests\Service\Import;
 
 use MintyPHP\Http\SessionStoreInterface;
 use MintyPHP\Service\Access\PermissionService;
-use MintyPHP\Service\Audit\ImportAuditService;
+use MintyPHP\Service\Audit\ImportAuditInterface;
 use MintyPHP\Service\Import\CsvReaderService;
 use MintyPHP\Service\Import\ImportService;
 use MintyPHP\Service\Import\ImportStateStoreService;
@@ -117,7 +117,7 @@ class ImportServiceTest extends TestCase
     ): ImportService {
         $csvReader = $csvReader ?? $this->createMock(CsvReaderService::class);
         $tempFileService = $tempFileService ?? $this->createMock(ImportTempFileService::class);
-        $auditService = $this->createMock(ImportAuditService::class);
+        $auditService = $this->createMock(ImportAuditInterface::class);
         $stateStore = $stateStore ?? $this->createMock(ImportStateStoreService::class);
         $permissionService = $this->createMock(PermissionService::class);
         $permissionService->method('userHas')->willReturn(false);