Delete row 15988 from events

seq 15988
id evt_8a8c31995ca6
kind signal_ingest
ts 2026-04-10T11:38:19.879463+00:00
actor collector:opportunity_research
subject_entity_ids []
payload {"created_at":"2026-04-10T11:38:19.879 ...
source_ref targeted_research:case_44d95bc775115fb5
confidence 0.6
dedupe_key opportunity_research_snapshot:39fc46e3bd1fcc83
episode_id NULL
created_at 2026-04-10T11:38:21.198668+00:00
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