* Added user start node restrictions to sibling endpoints. * Further integration tests. * Tidy up. * Apply suggestions from code review Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> * Revert previous update. * Retrieves item counts before and after the target for sibling endpoints and returns in API response. * Applied previous update correctly. * Removed blank line. * Fix build and test asserts following merge. * Update OpenApi.json. --------- Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> Co-authored-by: mole <nikolajlauridsen@protonmail.ch>