Fix ci-bonsai-daily: ProjectLibraryData duplicate parent-library enum

parent_libraries_enum() adds an explicit entry for get_root_context(),
then loops over cls.data["project_libraries"] (all IfcProjectLibrary
entities) and appends each. For a library-only file (no IfcProject),
get_root_context falls back to the top-level IfcProjectLibrary itself,
so the root is appended twice with the same enum key (its STEP id),
which Blender EnumProperty requires to be unique -> the data load
asserts. Normal project files are unaffected (root is an IfcProject
whose id never collides with a library id).

Skip library_id == root.id() in the loop (dedup by id, the colliding
key). Verified in headless Blender:
test_project_library_data.py::TestLibraryOnlyFile goes from 1 failed /
5 passed to 6 passed.

This change was made with the assistance of an AI tool.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/bonsai/bonsai/bim/module/project/data.py

@@ -165,6 +165,12 @@ class ProjectLibraryData:
         root = tool.Project.get_root_context(library_file)
         results.append((str(root.id()), f"{root.is_a()} {root.Name or 'Unnamed'}", root.Description or ""))
         for library_id, data in cls.data["project_libraries"].items():
+            # Library-only files have an IfcProjectLibrary as their root context, and
+            # project_libraries() collects every IfcProjectLibrary in the file (root
+            # included). Skip it here since it was already added above, otherwise the
+            # root library is listed twice with colliding enum keys.
+            if library_id == root.id():
+                continue
             results.append((str(library_id), data["Name"] or "Unnamed", data["Description"] or ""))
         return results