Delete row 478091 from events

seq 478091
id evt_b7b825ee1323
kind signal_candidate_ingest
ts 2026-04-22T03:03:32.063787+00:00
actor collector:discovery
subject_entity_ids []
payload {"created_at":"2026-04-22T03:03:32.063 ...
source_ref sec:edgar
confidence 1.0
dedupe_key discovery_sec_filing_delta:572ca3efa6133949
episode_id NULL
created_at 2026-04-22T03:03:56.432726+00:00
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