Declare numpy runtime dependency

[jeongseok-meta]

Summary

• Declare numpy as a runtime dependency in pyproject.toml.
• Update the editable package metadata in pixi.lock so locked CI installs stay consistent.

Motivation

MHR imports NumPy at runtime in mhr/io.py and mhr/mhr.py, for example for np.ndarray data handling and np.load(...) when loading blendshape and corrective activation data. However, the wheel metadata currently only declares torch and trimesh, so a clean install can install mhr without NumPy even though importing and using the package requires it.

This also forces downstream packagers, such as the conda-forge feedstock, to carry a patch that adds numpy to the generated package metadata. Declaring the dependency upstream keeps PyPI/wheel metadata accurate and lets downstream packaging drop that patch after the next release.

The ideal downstream end state is to remove recipe/pyproject-runtime-deps.patch from conda-forge entirely once a release includes this metadata fix. The patch still has to stay for the already-published 1.0.1 artifact because that source distribution is immutable.

Relevant links

• Runtime NumPy import in mhr/io.py:

  MHR/mhr/io.py

  Line 19 in c97817e

  import numpy as np

• Runtime NumPy import in mhr/mhr.py:

  MHR/mhr/mhr.py

  Line 21 in c97817e

  import numpy as np

• np.load(...) usage for runtime data loading:

  MHR/mhr/mhr.py

  Line 108 in c97817e

  blendshapes_data = np.load(blendshapes_path)

• conda-forge update that currently carries the metadata patch: [bot-automerge] mhr v1.0.1 conda-forge/mhr-feedstock#5

Details

This is a package metadata-only change. NumPy is already present in the development/test environment through other dependencies, but it should be declared directly because MHR itself imports it. The lockfile change is intentionally minimal: it adds numpy to the editable mhr package metadata without converting the lockfile format.

Test plan

• pixi run wheel-build
• unzip -p dist/*.whl "*/METADATA" | rg -n "^Requires-Dist: "
• pixi install -e py312 --locked
• pixi install -e py313 --locked
• pixi run -e py312 test
• pixi run -e py313 test