Delete row 318147 from events

seq 318147
id evt_90141e34010c
kind signal_ingest
ts 2026-04-19T15:39:54.708181+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-19T15:38:58.592 ...
source_ref candidate:sc_741d2c5c491c6e32
confidence 0.42
dedupe_key signal_enriched:news_delta:2831c18e62f95ac8
episode_id NULL
created_at 2026-04-19T15:39:54.708245+00:00
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