Delete row 17721 from events

seq 17721
id evt_f86f66a5e6d6
kind signal_candidate_ingest
ts 2026-04-10T15:51:15.884890+00:00
actor collector:discovery
subject_entity_ids []
payload {"created_at":"2026-04-10T15:51:15.884 ...
source_ref rss
confidence 1.0
dedupe_key discovery_unusual_volume_delta:a2605b0cd92e1710
episode_id NULL
created_at 2026-04-10T15:51:19.847679+00:00
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