Constraint validation does not work for readonly records

[dilanSachi]

Description:
Check the following sample.

import ballerina/io;
import ballerina/constraint;

type Album readonly & record {|
    @constraint:String {
        maxLength: 5,
        minLength: 1
    }
    string title;
    string artist;
|};

public function main() returns error? {
    Album a = {
        artist: "test",
        title: "testss"
    };
    Album validAlbum = check constraint:validate(a);
    io:println(validAlbum);
}

Ideally this should return an error. Instead it prints the value successfully.

{"title":"testss","artist":"test"}

constraint- v1.0.1