Delete row 481899 from events

seq 481899
id evt_9dc8815165a4
kind signal_ingest
ts 2026-04-22T13:48:38.161845+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-22T13:48:26.936 ...
source_ref candidate:sc_a8847badde60a567
confidence 0.42
dedupe_key signal_enriched:news_delta:46e9c7795a052e08
episode_id NULL
created_at 2026-04-22T13:48:38.161910+00:00
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