* Adds support for the "folders only" flag on retrieving siblings of a node.
* Apply suggestions from code review
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* Updated test code.
* Removed double secondary ordering by node Id and ensured we include this clause for all sort orders.
* Ensure that ordering by node Id is always added only once and last, and only if it's not already been included in the order by clause.
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Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
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