Delete row 339183 from events

seq 339183
id evt_8a81ec817795
kind signal_ingest
ts 2026-04-19T20:45:11.818089+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-19T20:14:07.003 ...
source_ref candidate:sc_e75739ce5c3f4098
confidence 0.42
dedupe_key signal_enriched:discovery_ipo_delta:e6887783bf2b8d ...
episode_id NULL
created_at 2026-04-19T20:45:11.818505+00:00
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