(cherry picked from commit 908df30d1a3cf328ea05344f0660af9b77bf24a1)
Reconcile-port: handler_support.py kept at HEAD (189 lines; A13 domain comments describe source's 1616-line handler_support layout, which does not exist here — functions live in server.py). test_longfunc_inventory.py kept as-is for now; it pins source architecture and will be re-pinned for the unified line in a final commit (recorded).
