Delete row 479405 from events

seq 479405
id evt_c0d924d94671
kind signal_ingest
ts 2026-04-22T06:07:56.650643+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-22T06:06:10.858 ...
source_ref candidate:sc_899cff4a941d852d
confidence 0.42
dedupe_key signal_enriched:discovery_ipo_delta:0d1006b46bd042 ...
episode_id NULL
created_at 2026-04-22T06:07:56.650700+00:00
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