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>

modules/audit/tests/Module/Audit/Service/AuditMetadataEnricherTest.php

@@ -0,0 +1,92 @@
+<?php
+
+namespace MintyPHP\Tests\Module\Audit\Service;
+
+use MintyPHP\Module\Audit\Service\AuditMetadataEnricher;
+use MintyPHP\Repository\User\UserReadRepositoryInterface;
+use PHPUnit\Framework\TestCase;
+
+class AuditMetadataEnricherTest extends TestCase
+{
+    private function newEnricher(UserReadRepositoryInterface $userReadRepository): AuditMetadataEnricher
+    {
+        return new AuditMetadataEnricher($userReadRepository);
+    }
+
+    public function testEnrichResolvesCreatedByAndModifiedBy(): void
+    {
+        $repo = $this->createMock(UserReadRepositoryInterface::class);
+        $repo->method('find')->willReturnMap([
+            [10, ['first_name' => 'Alice', 'last_name' => 'Smith', 'email' => 'alice@example.com', 'uuid' => 'uuid-10']],
+            [20, ['first_name' => 'Bob', 'last_name' => 'Jones', 'email' => 'bob@example.com', 'uuid' => 'uuid-20']],
+        ]);
+
+        $entity = ['created_by' => 10, 'modified_by' => 20];
+        $this->newEnricher($repo)->enrich($entity);
+
+        $this->assertSame('Alice Smith', $entity['created_by_label']);
+        $this->assertSame('uuid-10', $entity['created_by_uuid']);
+        $this->assertSame('Bob Jones', $entity['modified_by_label']);
+        $this->assertSame('uuid-20', $entity['modified_by_uuid']);
+    }
+
+    public function testEnrichFallsBackToEmailWhenNameEmpty(): void
+    {
+        $repo = $this->createMock(UserReadRepositoryInterface::class);
+        $repo->method('find')->willReturn(['first_name' => '', 'last_name' => '', 'email' => 'no-name@example.com', 'uuid' => 'uuid-x']);
+
+        $entity = ['created_by' => 5];
+        $this->newEnricher($repo)->enrich($entity, ['created_by']);
+
+        $this->assertSame('no-name@example.com', $entity['created_by_label']);
+        $this->assertSame('uuid-x', $entity['created_by_uuid']);
+    }
+
+    public function testEnrichSkipsZeroAndNegativeIds(): void
+    {
+        $repo = $this->createMock(UserReadRepositoryInterface::class);
+        $repo->expects($this->never())->method('find');
+
+        $entity = ['created_by' => 0, 'modified_by' => -1];
+        $this->newEnricher($repo)->enrich($entity);
+
+        $this->assertArrayNotHasKey('created_by_label', $entity);
+        $this->assertArrayNotHasKey('modified_by_label', $entity);
+    }
+
+    public function testEnrichSkipsMissingFields(): void
+    {
+        $repo = $this->createMock(UserReadRepositoryInterface::class);
+        $repo->expects($this->never())->method('find');
+
+        $entity = [];
+        $this->newEnricher($repo)->enrich($entity, ['created_by', 'modified_by']);
+
+        $this->assertArrayNotHasKey('created_by_label', $entity);
+    }
+
+    public function testEnrichHandlesUserNotFound(): void
+    {
+        $repo = $this->createMock(UserReadRepositoryInterface::class);
+        $repo->method('find')->willReturn(null);
+
+        $entity = ['created_by' => 999];
+        $this->newEnricher($repo)->enrich($entity, ['created_by']);
+
+        $this->assertArrayNotHasKey('created_by_label', $entity);
+    }
+
+    public function testEnrichWithCustomFields(): void
+    {
+        $repo = $this->createMock(UserReadRepositoryInterface::class);
+        $repo->method('find')->willReturn(['first_name' => 'Admin', 'last_name' => '', 'email' => 'admin@co.com', 'uuid' => 'uuid-a']);
+
+        $entity = ['status_changed_by' => 7, 'active_changed_by' => 7];
+        $this->newEnricher($repo)->enrich($entity, ['status_changed_by', 'active_changed_by']);
+
+        $this->assertSame('Admin', $entity['status_changed_by_label']);
+        $this->assertSame('uuid-a', $entity['status_changed_by_uuid']);
+        $this->assertSame('Admin', $entity['active_changed_by_label']);
+        $this->assertSame('uuid-a', $entity['active_changed_by_uuid']);
+    }
+}