Delete row 1686 from events

seq 1686
id evt_1dc4929ad5f6
kind signal_ingest
ts 2026-04-08T00:12:32.137260+00:00
actor daemon:signal_enrichment
subject_entity_ids []
payload {"created_at":"2026-04-07T23:23:54.391 ...
source_ref candidate:sc_2ef3e99d66515b91
confidence 0.78
dedupe_key signal_enriched:discovery_earnings_calendar_delta: ...
episode_id NULL
created_at 2026-04-08T00:12:32.137307+00:00
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