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/Models/IpPool.php

@@ -15,6 +15,7 @@ class IpPool extends Model
     protected $fillable = [
         'uuid',
         'ip_address',
+        'ip_block',
         'gateway',
         'cidr',
         'netmask',
@@ -24,10 +25,10 @@ class IpPool extends Model
         'ip_role',
         'parent_ip',
         'customer_name',
+        'customer_id',
         'service_name',
         'allocated_at',
         'revoked_at',
-        'allocation_status',
         'service_id',
         'contact_email',
         'contact_cc',
@@ -73,6 +74,16 @@ class IpPool extends Model
         return $this->belongsTo(ModuleNetwork::class, 'module_network_id', 'id');
     }
 
+    public function customer()
+    {
+        return $this->belongsTo(Customer::class);
+    }
+
+    public function logs()
+    {
+        return $this->hasMany(IpPoolLog::class)->latest('id');
+    }
+
     public function service()
     {
         return $this->belongsTo(Service::class, 'service_id');