Delete row 479589 from events

seq 479589
id evt_910f0b1e5391
kind signal_ingest
ts 2026-04-22T07:08:33.649595+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-22T07:06:43.381 ...
source_ref candidate:sc_e9a344d7439e8f75
confidence 0.74
dedupe_key signal_enriched:discovery_unusual_volume_delta:373 ...
episode_id NULL
created_at 2026-04-22T07:08:33.649649+00:00
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