mqtt, http, influx and delay carried the prototype's annotations and were
excluded wholesale. Annotating them leaves nothing to exclude: what the two
untyped dependencies need is an implicit-reexport allowance for
influxdb_client and the import-site ignore croniter already gets elsewhere.
InfluxDbNode.inject now takes the durable flag its supertype passes, and the
cron loop reads its stop event once instead of dereferencing a field that
stop_cron() may have cleared.
stroblme
2af7169e46