Delete row 850 from events

seq 850
id evt_eb592df265a4
kind signal_ingest
ts 2026-04-07T23:26:19.589290+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-07T23:23:54.391 ...
source_ref candidate:sc_eb0e35881f7e6f27
confidence 0.78
dedupe_key signal_enriched:discovery_sec_filing_delta:1f378ee ...
episode_id NULL
created_at 2026-04-07T23:26:19.589353+00:00
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