GammaLoop Model Asset License

Local SPDX identifier: LicenseRef-GammaLoop-No-Restrictions

The bundled UFO source models and their derived JSON forms were distributed
as GammaLoop model assets. GammaLoop's accompanying LICENSE.md states:

There are no usage restrictions for `GammaLoop`.

The upstream license separately calls attention to Symbolica's license
restrictions. Symbolica is not part of these model assets and its terms are
recorded independently in licenses/Symbolica.txt.

This notice applies only to the eligible GammaLoop-origin model assets listed
in src/pyamplicol/assets/models/PROVENANCE.toml. Files carrying their own
copyright or license notice retain that notice.
