[WIP] Timelock threading playground

[jkozlowski]

Goals (and why):

Implementation Description (bullets):

Testing (What was existing testing like? What have you done to improve it?):

Concerns (what feedback would you like?):

Where should we start reviewing?:

Priority (whenever / two weeks / yesterday):

[changelog-app]

Generate changelog in changelog/@unreleased

Type

• Feature
• Improvement
• Fix
• Break
• Deprecation
• Manual task
• Migration

Description

Changelog for RC.

Check the box to generate changelog(s)

• Generate changelog entry

[jkozlowski]

I am a dumbo

[stale]

This PR has been automatically marked as stale because it has not been touched in the last 30 days. If you'd like to keep it open, please leave a comment or add the 'long-lived' label, otherwise it'll be closed in 7 days.