Delete row 56784 from events

seq 56784
id evt_f52f7785a6a7
kind signal_ingest
ts 2026-04-16T11:17:30.637551+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-16T11:16:12.965 ...
source_ref candidate:sc_ccc16730054e2c71
confidence 0.78
dedupe_key signal_enriched:discovery_unusual_volume_delta:1c8 ...
episode_id NULL
created_at 2026-04-16T11:17:30.637599+00:00
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