Delete row 21975 from events

seq 21975
id evt_adbf2f943889
kind signal_ingest
ts 2026-04-11T07:18:47.289605+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-11T03:10:51.104 ...
source_ref candidate:sc_92236fadb313243e
confidence 0.78
dedupe_key signal_enriched:discovery_sec_filing_delta:7364a95 ...
episode_id NULL
created_at 2026-04-11T07:18:47.289667+00:00
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