Delete row 471618 from events

seq 471618
id evt_914b20f9728d
kind signal_candidate_ingest
ts 2026-04-21T15:19:25.858681+00:00
actor collector:discovery
subject_entity_ids []
payload {"created_at":"2026-04-21T15:19:25.858 ...
source_ref rss
confidence 1.0
dedupe_key discovery_ipo_delta:59ea3ed7c85547ce
episode_id NULL
created_at 2026-04-21T15:19:28.571397+00:00
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