feat: structural provider provenance via meta.provider

[sini]

Summary

• Adds meta.provider typed option tracking each aspect's structural origin as a path (e.g., ["foo" "bar"] for foo.provides.bar)
• providerPrefix threads through the provides submodule so child providers accumulate their parent's path
• mkAspectsType factory allows namespaces and den.provides to set their own provider root

How it works

The provides submodule extends providerPrefix with the current aspect's name before passing it to child provider types. Namespaces set providerPrefix = [ name ] as their root. den.provides uses [ "den" "provides" ]. Top-level aspects default to [].

This lets adapters distinguish "bar provided by foo" from a top-level "bar" by inspecting aspect.meta.provider.

[vic]

Flawless!

Please merge this yourself when you accept the maintainer invitation.