[Bug] Fix ID validation to take into account multiple values and UUID format

[alexjustesen]

📃 Description

Fix by_ids validation to take into account multiple values and that each should be a valid UUID v4 format.

✅ To-dos

• Pending feedback from @chrisjm: https://discord.com/channels/637049305412141098/641409246704959488/1349747672923377705

📏 Proposed rule

$uuids = array_map('trim', explode(',', $value));

foreach ($uuids as $uuid) {
    if (! preg_match('/^[a-f\d]{8}(-[a-f\d]{4}){4}[a-f\d]{8}$/i', $uuid)) {
        $fail("The {$attribute} contains invalid UUID: {$uuid}");
    }
}

[alexjustesen]

Yes, throw an error if the request contains an invalid uuid: https://discord.com/channels/637049305412141098/641409246704959488/1349769137039085660