Prevent `Runtime` use over forks#1208

Draft

VegetarianOrc wants to merge 8 commits intomainfrom

Commits on Nov 10, 2025

Raise an assertion error when a Runtime is used by client/worker creation/usage.
VegetarianOrc
committed
Add _RuntimeRef to encapsulate default runtime creation. Add Runtime.prevent_default to allow users to more easily enforce that a default runtime is never automatically created
VegetarianOrc
committed
remove blank line to fix linter error
VegetarianOrc
committed