Bootstrap in a separate thread?

Loading required modules can be a problem when you Save-Module a module that loads a DLL in the session, such as powershell-yaml.
When the Module is already present (i.e. during resolveDependency), it then loads the module and dll (for parsing build.yaml), and fail to redownload the module we want because it also tries to redownload the module it dpends on...
Quite annoying, something to explore...

Start by tracing resolveDependency and the Save-Module flow described in the issue, especially how loading powershell-yaml and its DLL affects dependency resolution. Clarify whether isolated or separate-thread bootstrapping is viable, then verify that an already-present dependency is not unnecessarily downloaded again while build.yaml parsing still works.

Written by the indexing model from the issue text.