Include git submodule contents in Python package build

Summary

The mlflow/assistant/skills git submodule was not being included in the Python package when running python -m build or dev/build.py. This needs to be fixed by adding the submodule path to the package-data configuration.

Problem

Git submodules are not automatically detected by Python build tools. The mlflow/assistant/skills submodule contains skill files (markdown, Python scripts) that need to be distributed with the package.

Solution

Update dev/pyproject.py to include "assistant/skills/**/*" in the _get_package_data() function. This file auto-generates pyproject.toml and pyproject.release.toml.

Changes Required

In dev/pyproject.py, modify the _get_package_data function around line 455-474:

def _get_package_data(package_type: PackageType) -> dict[str, list[str]] | None:
    if package_type == PackageType.TRACING:
        return None

    package_data = {
        "mlflow": [
            "store/db_migrations/alembic.ini",
            "temporary_db_migrations_for_pre_1_users/alembic.ini",
            "pyspark/ml/log_model_allowlist.txt",
            "server/auth/basic_auth.ini",
            "server/auth/db/migrations/alembic.ini",
            "models/notebook_resources/**/*",
            "ai_commands/**/*.md",
            "assistant/skills/**/*",  # ADD THIS LINE
        ]
    }

    if package_type != PackageType.SKINNY:
        package_data["mlflow"] += ["models/container/**/*", "server/js/build/**/*"]

    return package_data

After Making the Change

Run uv run python dev/pyproject.py to regenerate the pyproject.toml files.

Verification

After rebuilding with uv run python dev/build.py, verify the submodule is included:

unzip -l dist/mlflow-*.whl | grep "assistant/skills"

This should show ~22 files from the submodule.