Delete row 477651 from events

seq 477651
id evt_ec4340e7755a
kind signal_ingest
ts 2026-04-22T01:04:25.814860+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-22T01:02:27.838 ...
source_ref candidate:sc_ec34dbf31babdcd3
confidence 0.45000000000000007
dedupe_key signal_enriched:discovery_crypto_extremes_delta:a8 ...
episode_id NULL
created_at 2026-04-22T01:04:25.814915+00:00
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