Delete row 54693 from events

seq 54693
id evt_1583f311a14d
kind signal_ingest
ts 2026-04-16T02:40:31.563798+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-16T02:08:52.472 ...
source_ref candidate:sc_0be2949a13494b2c
confidence 0.72
dedupe_key signal_enriched:discovery_sec_filing_delta:bce3e3c ...
episode_id NULL
created_at 2026-04-16T02:40:31.563845+00:00
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