Delete row 481878 from events

seq 481878
id evt_39dc457d4dcf
kind signal_ingest
ts 2026-04-22T13:37:24.117374+00:00
actor collector:markets
subject_entity_ids []
payload {"created_at":"2026-04-22T13:37:19.928 ...
source_ref stooq
confidence 1.0
dedupe_key market_prices_snapshot:eea9f80568612a34
episode_id NULL
created_at 2026-04-22T13:37:24.123944+00:00
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