The service no longer schedules work itself. POST /api/v1/encyclopedia/run
syncs and runs the encyclopedia; it answers 502 when the run fails or the
text model stopped it, so a CronJob shows a failed run as a failed Job.
The sync loop keeps its startup sync and the webhook trigger; the 30-min
interval is a CronJob calling POST /api/v1/sync.
Removed: EncyclopediaBackgroundService, Encyclopedia RunAt/TimeZone,
Wiki:Sync IntervalSeconds/RetrySeconds.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>