Delete row 19406 from events

seq 19406
id evt_677d0735bf94
kind signal_ingest
ts 2026-04-10T20:16:52.195399+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-10T20:14:39.638 ...
source_ref candidate:sc_fe35bdd4ab43b578
confidence 0.72
dedupe_key signal_enriched:news_delta:1da4875ada5bcc9f
episode_id NULL
created_at 2026-04-10T20:16:52.195447+00:00
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