Delete row 139902 from events

seq 139902
id evt_b66449e831f7
kind signal_candidate_ingest
ts 2026-04-18T05:06:11.306726+00:00
actor collector:discovery
subject_entity_ids []
payload {"created_at":"2026-04-18T05:06:11.306 ...
source_ref rss
confidence 1.0
dedupe_key discovery_unusual_volume_delta:db835a6f44e3275f
episode_id NULL
created_at 2026-04-18T05:06:14.310494+00:00
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