Delete row 471228 from events

seq 471228
id evt_3fc4e2bb7e94
kind signal_ingest
ts 2026-04-21T13:47:43.412735+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-21T00:52:49.462 ...
source_ref candidate:sc_af205d22b181f990
confidence 0.42
dedupe_key signal_enriched:news_delta:dbf1ae9ca879523d
episode_id NULL
created_at 2026-04-21T13:47:43.412793+00:00
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