Delete row 177724 from events

seq 177724
id evt_e9ba3c2859d1
kind signal_ingest
ts 2026-04-18T11:13:04.554227+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-18T11:11:26.670 ...
source_ref candidate:sc_c1c4ed4e146831a0
confidence 0.72
dedupe_key signal_enriched:discovery_unusual_volume_delta:7c6 ...
episode_id NULL
created_at 2026-04-18T11:13:04.554290+00:00
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