Delete row 469926 from events

seq 469926
id evt_a63796c5f42f
kind signal_ingest
ts 2026-04-21T07:44:14.968112+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-21T03:09:54.871 ...
source_ref candidate:sc_4e3bb7440194d7bd
confidence 0.62
dedupe_key signal_enriched:discovery_sec_filing_delta:55daa2a ...
episode_id NULL
created_at 2026-04-21T07:44:14.968210+00:00
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