Delete row 475722 from events

seq 475722
id evt_6da19580c262
kind signal_ingest
ts 2026-04-21T23:21:12.627581+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-21T19:57:20.275 ...
source_ref candidate:sc_4788e78673504b3a
confidence 0.62
dedupe_key signal_enriched:discovery_unusual_volume_delta:d3e ...
episode_id NULL
created_at 2026-04-21T23:21:12.627637+00:00
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