Delete row 470488 from events

seq 470488
id evt_357c556e7edd
kind signal_ingest
ts 2026-04-21T10:40:52.207193+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-21T03:09:54.871 ...
source_ref candidate:sc_b9a43140a1d8ae4c
confidence 0.74
dedupe_key signal_enriched:discovery_sec_filing_delta:b546687 ...
episode_id NULL
created_at 2026-04-21T10:40:52.207875+00:00
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