Delete row 38968 from events

seq 38968
id evt_64c892532a26
kind signal_candidate_ingest
ts 2026-04-07T17:22:31.647542+00:00
actor collector:discovery
subject_entity_ids []
payload {"created_at":"2026-04-07T17:22:31.647 ...
source_ref rss
confidence 1.0
dedupe_key discovery_options_flow_delta:c4dfcd5ab0ca2994
episode_id NULL
created_at 2026-04-07T17:22:38.598799+00:00
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