Roadmap initiative: Clean async stack traces

[eholk]

This issue tracks the steps for setting up a new initiative in the async vision roadmap. Please read the instructions for owning an initiative.

Top-level goal: #249 Initiative owner: TBD

Each initiative should have a landing page, linked to from the roadmap. This can be a page on this website or a dedicated repo.

For in-progress initiatives the landing page should include, or have pointers to:

• [x] Goals and impact of the initiative
• [ ] Milestones
• [x] Design notes and documentation (this may be sparse in the beginning)
• [ ] Links to any organizing tools, such as a project board
• [ ] The initiative owner
• [ ] The current set of stakeholders and the area(s) they represent
• [ ] Notes on how to get involved
• [x] For landing pages not on this website, a link back to the overall roadmap

For making a dedicated repo, it's recommended to use this initiative template as a starting point.

Remember, you don't have to do these all at once!

This issue can be closed when all of the above items are complete.