Delete row 475590 from events

seq 475590
id evt_436f5ab34e26
kind signal_ingest
ts 2026-04-21T23:14:33.923614+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-21T18:18:22.267 ...
source_ref candidate:sc_9dfc898a7b7ceb61
confidence 0.45000000000000007
dedupe_key signal_enriched:discovery_unusual_volume_delta:395 ...
episode_id NULL
created_at 2026-04-21T23:14:33.923655+00:00
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