fix: restrict condition name to 50 characters

[d-jeffery]

Description

Restrict character limit of condition down to 50 characters. Left the patterns as they were.

References

https://github.com/openfga/language/issues/319

Review Checklist

• [ ] I have clicked on "allow edits by maintainers".
• [ ] I have added documentation for new/changed functionality in this PR or in a PR to openfga.dev [Provide a link to any relevant PRs in the references section above]
• [ ] The correct base branch is being used, if not main
• [ ] I have added tests to validate that the change in functionality is working as expected