Child ids sharing a prefix no longer suppress each other (split and
compare entries for equality), and queued mode keeps a second child's
day-complete event from being dropped while the first notify runs.
Triggers on nestquest_child_day_complete (never a zero-quest day),
notifies with the payload's child name, and dedupes per child per
day via an input_text helper holding <child_id>:<today> entries
pruned to today — a re-cleared day does not re-fire, but a second
child clearing the same day still celebrates.