Sort defaultAttributes map and improve schema default handling

[JaylonmcShan03]

Description

This pr updates the schema's handling of default values by pulling defaults from a defaultAttributes map, and refactors the defaultAttributes map by sorting it alphabetically

Acceptance tests

• [ ] Have you added an acceptance test for the functionality being added?

Release Note

Release note for CHANGELOG:

...

References

Community Note

• Please vote on this issue by adding a 👍 reaction to the original issue to help the community and maintainers prioritize this request
• If you are interested in working on this issue or have submitted a pull request, please leave a comment