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>

routes/api/admin/billing.php

@@ -13,6 +13,7 @@ Route::prefix('orders')
     ->controller(OrderController::class)
     ->group(function () {
         Route::get('/', 'index')->middleware('perm:order.view');
+        Route::get('export', 'export')->middleware('perm:order.view');
         Route::get('/domain-pricing', 'domainPricing')->middleware('perm:order.create');
         Route::post('/upload-proof', 'uploadProof')->middleware('perm:order.create');
         Route::post('/', 'store')->middleware('perm:order.create');
@@ -28,6 +29,7 @@ Route::prefix('invoices')
     ->controller(InvoiceController::class)
     ->group(function () {
         Route::get('/', 'index')->middleware('perm:invoice.view');
+        Route::get('export', 'export')->middleware('perm:invoice.view');
         Route::post('/', 'store')->middleware('perm:invoice.create');
         Route::get('{id}', 'show')->middleware('perm:invoice.view');
         Route::put('{id}', 'update')->middleware('perm:invoice.edit');