Delete row 469086 from events

seq 469086
id evt_607423fa521f
kind signal_candidate_ingest
ts 2026-04-21T03:09:54.871544+00:00
actor collector:discovery
subject_entity_ids []
payload {"created_at":"2026-04-21T03:09:54.871 ...
source_ref sec:edgar
confidence 1.0
dedupe_key discovery_sec_filing_delta:47785fb31873b64e
episode_id NULL
created_at 2026-04-21T03:10:07.665874+00:00
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