Delete row 5909 from events

seq 5909
id evt_b9688456231b
kind signal_ingest
ts 2026-04-08T10:34:01.520968+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-08T10:33:26.208 ...
source_ref candidate:sc_c9bc1f9bf8076d2a
confidence 0.7
dedupe_key signal_enriched:discovery_options_flow_delta:ee8bc ...
episode_id NULL
created_at 2026-04-08T10:34:01.521029+00:00
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