Delete row 7804 from events

seq 7804
id evt_81053cde9429
kind signal_emitted
ts 2026-04-09T20:38:40.458758+00:00
actor technical_analyzer
subject_entity_ids []
payload {"created_at":"2026-04-09T20:38:40.458 ...
source_ref NULL
confidence 0.5889754136986477
dedupe_key ta:technical_indicator_signal:emaCrossUp:ema_signa ...
episode_id NULL
created_at 2026-04-09T20:39:25.602138+00:00
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