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/Invoice/Concerns/HandlesInvoiceAttachments.php

@@ -31,7 +31,7 @@ trait HandlesInvoiceAttachments
         }
 
         $request->validate([
-            'file' => 'required|file|mimes:jpg,jpeg,png,gif,webp,pdf,doc,docx,xls,xlsx|max:51200',
+            'file' => InvoiceAttachment::UPLOAD_RULE,
             'type' => 'nullable|in:' . InvoiceAttachment::TYPE_PAYMENT_PROOF . ',' . InvoiceAttachment::TYPE_DEPLOYMENT,
         ]);