d2f4ebcd6a
Calling an API function after the node panels patch does not internally tag the node tree with `NTREE_CHANGED_INTERFACE` any more, because the node tree is not directly accessible from `bNodeTreeInterface`. Before node panels the API functions for interfaces could tag the tree directly for later update consideration, which now requires explicit tagging calls. The fix is to add a flag and mutex directly to `bNodeTreeInterface`, so API methods can tag after updates. This mostly copies runtime data concepts from `bNodeTree`. The `ensure_interface_cache` method is equivalent to `ensure_topology_cache` and should be called before accessing `interface_inputs` and similar cache data. Pull Request: https://projects.blender.org/blender/blender/pulls/111741
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