HA event triggers expose the payload as trigger.event.data, not
trigger.payload; fix the blueprint, its tests, and the README
examples, with a regression guard.
README gains the blueprint section: all four blueprints, their
inputs, the wiring table to the options-flow notification settings,
the celebration helper setup, event/sensor payload reference, and a
copy-pasteable example package. Tests assert every event trigger
references a real NestQuest event and no reminder is produced for an
absent child.
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.