Merge pull request 'feat(addon-system): add <kindred> package.xml extensions and schema docs' (#257) from feat/package-xml-schema into main

Reviewed-on: #257

src/Mod/Create/addon_loader.py

@@ -381,7 +381,16 @@ def resolve_load_order(
             ts.add(m.name, *known_deps)
 
     try:
-        order = list(ts.static_order())
+        # Process level by level so we can sort within each topological level
+        ts.prepare()
+        order = []
+        while ts.is_active():
+            ready = list(ts.get_ready())
+            # Sort each level by (priority, name) for determinism
+            ready.sort(key=lambda n: (by_name[n].load_priority, n) if n in by_name else (999, n))
+            for name in ready:
+                ts.done(name)
+            order.extend(ready)
     except CycleError as e:
         FreeCAD.Console.PrintWarning(
             f"Create: Dependency cycle detected: {e}. Falling back to priority order.\n"
@@ -391,8 +400,7 @@ def resolve_load_order(
             key=lambda m: (m.load_priority, m.name),
         )
 
-    # Filter to actual manifests, preserving topological order
-    # Secondary sort within independent groups by (priority, name)
+    # Filter to actual manifests, preserving sorted topological order
     result = []
     for name in order:
         m = by_name.get(name)