Delete row 477876 from events

seq 477876
id evt_87089de7ced7
kind signal_ingest
ts 2026-04-22T02:07:08.203554+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-22T02:07:01.716 ...
source_ref candidate:sc_8b29e66993b89b87
confidence 0.42
dedupe_key signal_enriched:news_delta:0be012b9e39d3427
episode_id NULL
created_at 2026-04-22T02:07:08.203633+00:00
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