Stub file information doesn't seem to be included from `_lib.pyi`

Package setup

We have some internal namespace package written in Rust & PyO3.

It's organized like this:

pyproject.toml
uv.lock
tests/
  [...]
src/
  [internal namespace]/
    [pkg name]/
      __init__.py
      py.typed
      _lib.so
      _lib.pyi

_lib.so is the shared library built from our Rust code. In our __init__.py, we reference this:

$ cat __init__.py
from ._lib import [ClassA, ClassB, ...]

__all__ = [
    "[ClassA]",
    "[ClassB]",
    ...
]

Problem description

When I now create documentation by calling pdoc [namespace].[pkgname], I'm given this function documentation for example:

(ignore the slightly broken formatting of the docstring, this is because we haven't standardized docstring formats yet 😅 )

As you can see, it contains function signature defaults, all parameters and the docstring. But it entirely misses typing information that is in _lib.pyi.

When I create documentation with pdoc [namespace].[pkgname]._lib, I do see information from the stub file though!

But now, the documentation is limited purely to the _lib submodule. Is there a way to create documentation of the entire package, but also correctly discovering stub files automatically?

System Information

$ pdoc --version
pdoc: 15.0.1
Python: 3.11.9
Platform: Linux-6.13.7-1-MANJARO-x86_64-with-glibc2.41

Compare the package-level output from pdoc [namespace].[pkgname] with the output for [namespace].[pkgname]._lib, focusing on init.py and _lib.pyi. Trace how stub information is discovered for the submodule and determine what package-level behavior should include the typing information. Done means documenting the package automatically includes the relevant information from _lib.pyi.