Delete row 421718 from events

seq 421718
id evt_f6944217daa5
kind signal_ingest
ts 2026-04-20T10:32:38.341112+00:00
actor collector:markets
subject_entity_ids []
payload {"created_at":"2026-04-20T10:32:34.373 ...
source_ref stooq
confidence 1.0
dedupe_key market_prices_snapshot:413858e85a8c04e7
episode_id NULL
created_at 2026-04-20T10:32:38.341225+00:00
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