Fix: auto-generated renewal invoices marked as 'sent' immediately

Without this, invoices stay in 'draft' and don't appear in the payment
wizard (which only queries sent/partially_paid/overdue).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/Console/Commands/GenerateRenewalInvoices.php

@@ -99,6 +99,9 @@ public function handle(InvoiceService $invoiceService, PricingService $pricingSe
                     ],
                 ], $systemUser);
 
+                // Mark as sent immediately so it appears in payment wizard
+                $invoice->update(['status' => \App\Domain\Financial\Enums\InvoiceStatus::Sent]);
+
                 $this->advanceNextBillingDate($enrollment);
 
                 $enrollment->update([