chore: add migration to clear import queue

app/Database/Migrations/2024-04-26-100000_clear_import_queue.php

@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Database\Migrations;
+
+use CodeIgniter\Database\Migration;
+
+/**
+ * CodeIgniter 4.5.1 introduces new DataCaster class that breaks deserialization of import queue tasks.
+ * This just removes them altogether.
+ */
+class ClearImportQueue extends Migration
+{
+    public function up(): void
+    {
+        service('settings')->forget('Import.queue');
+    }
+
+    public function down(): void
+    {
+        // nothing
+    }
+}