Update packaging toolchain for Metadata-Version 2.5 wheels

[Copilot]

The check_packaging GitHub Actions job was failing in twine check because the pinned packaging toolchain could not validate wheels emitted with Metadata-Version: 2.5. This updates the packaging dependency pin and lockfile so the packaging workflow can validate current build output again.

• Root cause

  • twine==6.2.0 rejects the built wheel as an invalid distribution because it does not accept metadata version 2.5.

• Change

  • Bump the packaging-group pin from twine==6.2.0 to twine==7.0.0 in pyproject.toml.
  • Refresh uv.lock to capture the updated packaging dependency set.

• Impact

  • Keeps the existing packaging workflow unchanged.
  • Restores compatibility between the build backend’s emitted metadata and the validation step run in CI.

[dependency-groups]
-packaging = ["build==1.5.0", "twine==6.2.0"]
+packaging = ["build==1.5.0", "twine==7.0.0"]