Delete row 478090 from events

seq 478090
id evt_720a0531984f
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:4e5e84e54023f000
episode_id NULL
created_at 2026-04-22T03:03:56.430772+00:00
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