fix: use correct type for attribute arguments

[asterite]

Description

Problem

Resolves #6373

Summary

By unifying before evaluating the argument we'll have the type bindings correctly set.

Additional Context

Documentation

Check one:

• No documentation needed.
• Documentation included in this PR.
• [For Experimental Features] Documentation to be submitted in a separate PR.

PR Checklist

• I have tested the changes locally.
• I have formatted the changes with Prettier and/or cargo fmt on default settings.