shadowsocks configuration migration failing in a non-standard case.

[noseshimself]

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Describe the bug
Migration fails.

To Reproduce

/usr/local/opnsense/mvc/script # ./run_migrations.php
*** OPNsense\Shadowsocks\Local Migration failed, check log for details

Relevant configuration section:

   <shadowsocks>
      <general version="1.0.1">
        <enabled>1</enabled>
        <serveraddress>192.168.111.254</serveraddress>
        <serverport>8388</serverport>
        <localport>1080</localport>
        <password>Gerstel-SOCKS-with-holes</password>
        <cipher>aes-256-cfb</cipher>
        <tcpudpmode>tcp_only</tcpudpmode>
      </general>
    </shadowsocks>

Expected behavior

Migration succeeds.

Relevant log files

<147>1 2024-06-28T13:44:53+00:00 gw-ext-1.gerstel.com config 76630 - [meta sequenceId="6"] [OPNsense\Shadowsocks\Local:cipher] Option not in list.{AES-256-CFB}
<147>1 2024-06-28T13:44:53+00:00 gw-ext-1.gerstel.com config 76630 - [meta sequenceId="7"] Model OPNsense\Shadowsocks\Local can't be saved, skip ( OPNsense\Base\ValidationException: [OPNsense\Shadowsocks\Local:cipher] Option not in list.{AES-256-CFB}

Additional context

Add any other context about the problem here.

Environment

FreeBSD 13.2-RELEASE-p11 stable/24.1-n255023-99a14409566 SMP amd64
OPNsense 24.1.9_4 908aac0
Plugins os-OPNProxy-1.0.5_1 os-OPNWAF-1.1 os-OPNcentral-1.7 os-dmidecode-1.1_1 os-dyndns-1.27_3 os-lldpd-1.1_2 os-maltrail-1.10 os-nextcloud-backup-1.0_1 os-redis-1.1_2 os-rfc2136-1.8_2 os-shadowsocks-1.1 os-squid-1.0_2 os-sunnyvalley-1.4_3 os-theme-cicada-1.35 os-theme-rebellion-1.8.10 os-theme-tukan-1.27_1 os-theme-vicuna-1.45_1 os-vnstat-1.3_1
Time Thu, 27 Jun 2024 01:08:27 +0000
OpenSSL 3.0.14
Python 3.11.9
PHP 8.2.20