Use custom message if exists

[Vitaliy-Svinchyak]

Hello,

I am using custom error messages in my project. Sth like:

#[validate(length(min = 1, max = 1000, message = "Title should have length from 1 to 1000"))]

But I found that it is not used in response. So this is a fix

[AndreyErmilov]

Thanks! Could you add a test?