Delete row 477170 from events

seq 477170
id evt_1288d8be165c
kind signal_ingest
ts 2026-04-22T00:06:48.786173+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-22T00:01:09.681 ...
source_ref candidate:sc_8f059419c92c4593
confidence 0.42
dedupe_key signal_enriched:discovery_earnings_calendar_delta: ...
episode_id NULL
created_at 2026-04-22T00:06:48.786227+00:00
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