Delete row 18924 from events

seq 18924
id evt_936ff484be64
kind signal_ingest
ts 2026-04-10T18:45:30.853766+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-10T17:21:18.772 ...
source_ref candidate:sc_fdf7f657029c85d4
confidence 0.78
dedupe_key signal_enriched:discovery_options_flow_delta:a9ab4 ...
episode_id NULL
created_at 2026-04-10T18:45:30.853821+00:00
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