Delete row 21553 from events

seq 21553
id evt_3fbddf771e84
kind signal_candidate_ingest
ts 2026-04-11T04:40:44.159667+00:00
actor collector:discovery
subject_entity_ids []
payload {"created_at":"2026-04-11T04:40:44.159 ...
source_ref rss
confidence 1.0
dedupe_key discovery_ipo_delta:2adff0c157acaecd
episode_id NULL
created_at 2026-04-11T04:40:47.847536+00:00
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