Delete row 469907 from events

seq 469907
id evt_6de152018f52
kind signal_ingest
ts 2026-04-21T07:42:28.645806+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-21T03:09:54.871 ...
source_ref candidate:sc_431326476c8197e1
confidence 0.78
dedupe_key signal_enriched:discovery_sec_filing_delta:7803294 ...
episode_id NULL
created_at 2026-04-21T07:42:28.645872+00:00
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