Fix duplicate Sphinx label baselibs_architecture #545

A documentation build reports this warning:

docs/features/architecture/index.rst:14: WARNING: duplicate label baselibs_architecture, other instance in score_platform/docs/features/baselibs/architecture/index.rst

Both documents define the same plain Sphinx label:

.. _baselibs_architecture:

The two documents appear to describe different architecture levels:

• Baselibs documents its module-level architecture in docs/features/architecture/index.rst.
• SCORE Platform documents the Baselibs feature architecture in score_platform/docs/features/baselibs/architecture/index.rst.

The Sphinx-Needs document IDs are already distinct (doc__baselibs_module_architecture and doc__baselibs_architecture); the conflict is between the ordinary Sphinx labels, which must be unique across the documentation set.

The likely fix is to give the Baselibs module architecture page a more specific label, such as baselibs_module_architecture, while keeping its existing Sphinx-Needs ID. Please confirm the preferred naming.