daily and weekly schedule automatic re-crawls;
manual clears the schedule so the source is only re-crawled via
resyncWebSource. Cadence changes take effect immediately and reset
the clock: the next scheduled run becomes now plus the new interval.
Scheduled refreshes run on a rolling interval from the last completed run (there is no
time-of-day control).
Required fields: sourceId, refreshCadence
Example request
400whensourceIdis missing orrefreshCadenceis notdaily,weekly, ormanual.404if the web source is not found.