Delete row 457 from events

seq 457
id evt_4ac98510a1a7
kind signal_candidate_ingest
ts 2026-04-07T23:23:54.391414+00:00
actor collector:discovery
subject_entity_ids []
payload {"created_at":"2026-04-07T23:23:54.391 ...
source_ref sec:edgar
confidence 1.0
dedupe_key discovery_sec_filing_delta:6d19747f6cc4ff35
episode_id NULL
created_at 2026-04-07T23:24:05.378570+00:00
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