build(deps): bump django-treebeard from 4.7.1 to 6.0.0

[dependabot]

Bumps django-treebeard from 4.7.1 to 6.0.0.

Changelog

Sourced from django-treebeard's changelog.

Release 6.0.0 (Jul 20, 2026)

Treebeard 6.0.0 is a major release. It features a change to Treebeard's API.

The following methods that previously existing on the Node model class have now moved to the model manager instead:

• load_bulk
• dump_bulk
• find_problems
• fix_tree
• get_tree
• get_descendants_group_count
• get_annotated_list_qs
• get_annotated_list
• get_root_nodes
• get_first_root_node
• get_last_root_node
• get_children
• get_children_count
• get_siblings
• get_descendants
• get_descendant_count
• get_first_child
• get_last_child
• get_first_sibling
• get_last_sibling
• get_prev_sibling
• get_next_sibling
• get_root
• get_parent
• get_ancestors

So, for example, code like this:

    node.get_children()

Would need to be rewritten as:

    MyModel.objects.get_children(node)

Putting these methods on the model manager instead of the model class is more consistent with Django's design patterns, and provides much more flexibility with their use. It also keeps the model class slim, avoiding conflicts with code layered on top.

... (truncated)

Commits

• 736e1cd Bump to version 6
• abd9908 Move table-level methods into managers
• e0adc62 Fix version number in changelog
• 98ee4ac Bump to version 5.3.0
• 8f4db3f Fix related name conflicts in test models.
• bd8b248 Add checks to ensure manager methods subclass Treebeard managers
• b33a2fc Add regression test for #405
• decc4f9 Add support for many-to-many relationships to Node.load_bulk()
• 34fed3a fix: clear prefetch_related before iterator() in delete methods (fixes #405)
• 3d0c1fc Revert change to MP_Node.get_ancestors() that caused a performance regression
• Additional commits viewable in compare view

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