Delete row 469885 from events

seq 469885
id evt_ee21cd1003d3
kind signal_ingest
ts 2026-04-21T07:41:17.748657+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-21T03:09:54.871 ...
source_ref candidate:sc_18668aef885c12f0
confidence 0.72
dedupe_key signal_enriched:discovery_sec_filing_delta:e5b3a53 ...
episode_id NULL
created_at 2026-04-21T07:41:17.748712+00:00
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