Delete row 474689 from events

seq 474689
id evt_841284ca0f6e
kind signal_ingest
ts 2026-04-21T22:45:04.105654+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-20T17:15:12.787 ...
source_ref candidate:sc_199d1febee77935b
confidence 0.52
dedupe_key signal_enriched:discovery_new_listings_delta:e8937 ...
episode_id NULL
created_at 2026-04-21T22:45:04.105702+00:00
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