Delete row 418912 from events

seq 418912
id evt_639c776ac718
kind signal_candidate_ingest
ts 2026-04-20T10:08:18.324557+00:00
actor collector:discovery
subject_entity_ids []
payload {"created_at":"2026-04-20T10:08:18.324 ...
source_ref rss
confidence 1.0
dedupe_key discovery_ipo_delta:d4eb0e9b29ac94ab
episode_id NULL
created_at 2026-04-20T10:08:21.173232+00:00
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