feat(admin): IP pool allocation, billing exports, service attachments

- IP pool: sheet import (xlsx/csv) matched by address, bulk allocate/revoke
  with notification email (ip_allocated/ip_revoked), ip_pool_logs history.
- Orders/invoices: Excel export on branded template (BrandedReportWriter),
  shared billing filters, order item service info in list responses.
- Web design quote Excel export; activity log export.
- Service attachments with copy-to-invoice; deployment invoice attachments.
- Customer email attachments stored on disk and attached by path.
- Admin password change endpoint; user.fullname backfill migration;
  orders.user_id backfill from logs.
- Disable deploy workflow until CI/CD is set up.
- Ignore stored customer email and service attachment uploads.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/Http/Controllers/Api/Admin/Customer/Concerns/ManagesCustomerAccount.php

@@ -2,6 +2,7 @@
 
 namespace App\Http\Controllers\Api\Admin\Customer\Concerns;
 
+use App\Support\MailAttachments;
 use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Auth;
@@ -64,6 +65,7 @@ trait ManagesCustomerAccount
             'cc' => 'nullable|string|max:1000',
             'bcc' => 'nullable|string|max:1000',
             'with_layout' => 'nullable|boolean',
+            ...MailAttachments::rules(),
         ]);
 
         $this->mailService->sendCustomEmail($uuid, $data, Auth::guard('admin')->user(), $request->ip());