fix: [encryption keys] allow for large keys

- @adulau has a massive... key.

config/Migrations/20240516000003_MonsterKeySupport.php

@@ -0,0 +1,30 @@
+<?php
+declare(strict_types=1);
+
+use Migrations\AbstractMigration;
+use Phinx\Db\Adapter\MysqlAdapter;
+
+final class MonsterKeySupport extends AbstractMigration
+{
+    public $autoId = false; // turn off automatic `id` column create. We want it to be `int(10) unsigned`
+
+    /**
+     * Change Method.
+     *
+     * Write your reversible migrations using this method.
+     *
+     * More information on writing migrations is available here:
+     * https://book.cakephp.org/phinx/0/en/migrations.html#the-change-method
+     *
+     * Remember to call "create()" or "update()" and NOT "save()" when working
+     * with the Table class.
+     */
+    public function change(): void
+    {
+        $this->table('encryption_keys')
+        ->changeColumn('encryption_key', 'text', [
+            'limit' => MysqlAdapter::TEXT_MEDIUM
+        ])
+        ->update();
+    }
+}