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>

phpunit.xml

@@ -16,6 +16,7 @@
     <env name="DB_CONNECTION" value="mysql"/>
     <env name="DB_DATABASE" value="tgs_portal_test"/>
     <env name="MAIL_MAILER" value="array"/>
+    <env name="MAIL_FROM_ADDRESS" value="test@example.com"/>
     <env name="QUEUE_CONNECTION" value="sync"/>
     <env name="SESSION_DRIVER" value="array"/>
     <env name="TELESCOPE_ENABLED" value="false"/>