Delete row 19640 from events

seq 19640
id evt_62255f9012c2
kind signal_emitted
ts 2026-04-10T20:45:16.804857+00:00
actor technical_analyzer
subject_entity_ids []
payload {"created_at":"2026-04-10T20:45:16.804 ...
source_ref NULL
confidence 0.5670932266209002
dedupe_key ta:technical_indicator_signal:emaCrossUp:ema_signa ...
episode_id NULL
created_at 2026-04-10T20:45:26.734796+00:00
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