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/lib/Module/Audit/AuditAuthorizationPolicy.php

@@ -0,0 +1,55 @@
+<?php
+
+namespace MintyPHP\Module\Audit;
+
+use MintyPHP\Service\Access\AuthorizationDecision;
+use MintyPHP\Service\Access\AuthorizationPolicyInterface;
+use MintyPHP\Service\Access\PermissionService;
+
+final class AuditAuthorizationPolicy implements AuthorizationPolicyInterface
+{
+    public const ABILITY_API_AUDIT_VIEW = 'audit.api.view';
+    public const ABILITY_SYSTEM_AUDIT_VIEW = 'audit.system.view';
+    public const ABILITY_SYSTEM_AUDIT_PURGE = 'audit.system.purge';
+    public const ABILITY_IMPORTS_AUDIT_VIEW = 'audit.imports.view';
+    public const ABILITY_USER_LIFECYCLE_VIEW = 'audit.user_lifecycle.view';
+    public const ABILITY_USER_LIFECYCLE_RESTORE = 'audit.user_lifecycle.restore';
+
+    private const ABILITY_PERMISSION_MAP = [
+        self::ABILITY_API_AUDIT_VIEW => 'api_audit.view',
+        self::ABILITY_SYSTEM_AUDIT_VIEW => 'system_audit.view',
+        self::ABILITY_SYSTEM_AUDIT_PURGE => 'system_audit.purge',
+        self::ABILITY_IMPORTS_AUDIT_VIEW => 'imports.audit.view',
+        self::ABILITY_USER_LIFECYCLE_VIEW => 'user_lifecycle_audit.view',
+        self::ABILITY_USER_LIFECYCLE_RESTORE => 'users.lifecycle_restore',
+    ];
+
+    public function __construct(
+        private readonly PermissionService $permissionService
+    ) {
+    }
+
+    public function supports(string $ability): bool
+    {
+        return isset(self::ABILITY_PERMISSION_MAP[$ability]);
+    }
+
+    public function authorize(string $ability, array $context = []): AuthorizationDecision
+    {
+        $actorUserId = (int) ($context['actor_user_id'] ?? 0);
+        if ($actorUserId <= 0) {
+            return AuthorizationDecision::deny(403, 'forbidden');
+        }
+
+        $permissionKey = self::ABILITY_PERMISSION_MAP[$ability] ?? null;
+        if ($permissionKey === null) {
+            return AuthorizationDecision::deny(403, 'forbidden');
+        }
+
+        if (!$this->permissionService->userHas($actorUserId, $permissionKey)) {
+            return AuthorizationDecision::deny(403, 'forbidden');
+        }
+
+        return AuthorizationDecision::allow();
+    }
+}