Tests for the no-data-loss deactivation contract over the existing
set_child_active business function: a child with a definition,
instance and completion event keeps all three rows byte-identical
through deactivate and reactivate, is excluded from (and restored to)
the active list, and stays in the full list. A structural guard proves
the no-delete property: no module carries DELETE targeting children
and ChildrenDao exposes no delete-shaped method. Suite: 853 passed.
Joshua King
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