Delete row 477940 from events

seq 477940
id evt_5a3e1693449c
kind signal_ingest
ts 2026-04-22T02:30:24.126750+00:00
actor collector:markets
subject_entity_ids []
payload {"created_at":"2026-04-22T02:30:19.748 ...
source_ref google_news_rss
confidence 1.0
dedupe_key market_headlines_snapshot:a8e18c44ab52cb1e
episode_id NULL
created_at 2026-04-22T02:30:24.127004+00:00
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