Delete row 15839 from events

seq 15839
id evt_4eccb72a3e45
kind signal_candidate_ingest
ts 2026-04-10T11:10:59.787651+00:00
actor collector:discovery
subject_entity_ids []
payload {"created_at":"2026-04-10T11:10:59.787 ...
source_ref rss
confidence 1.0
dedupe_key discovery_unusual_volume_delta:ca64039db66ea98b
episode_id NULL
created_at 2026-04-10T11:11:04.418966+00:00
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