Delete row 53815 from events

seq 53815
id evt_20a04ec88758
kind signal_candidate_ingest
ts 2026-04-16T02:08:52.472606+00:00
actor collector:discovery
subject_entity_ids []
payload {"created_at":"2026-04-16T02:08:52.472 ...
source_ref sec:edgar
confidence 1.0
dedupe_key discovery_sec_filing_delta:d11c9edd0996a429
episode_id NULL
created_at 2026-04-16T02:09:06.469021+00:00
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