fix invoice and enrollment fees

app/Database/Migrations/2026-08-27-000300_DropUnusedInvoiceLines.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Database\Migrations;
+
+use CodeIgniter\Database\Migration;
+
+final class DropUnusedInvoiceLines extends Migration
+{
+    public function up(): void
+    {
+        if ($this->db->tableExists('invoice_lines')) {
+            $this->forge->dropTable('invoice_lines', true);
+            $this->db->resetDataCache();
+        }
+    }
+
+    public function down(): void
+    {
+        // invoice_lines was intentionally removed from the financial model.
+    }
+}