Delete row sig_fe88aa1a8bf4 from signals

id sig_fe88aa1a8bf4
event_id evt_a26bc3a7bab4
watcher_id NULL
signal_type technical_indicator_signal
value {"bars":600,"confidence":0.5597703 ...
threshold NULL
direction NULL
severity medium
window NULL
source technical_analyzer
reason_trace {"cutoff_iso":"2026-04-14T20:44:04Z ...
dedupe_key ta:technical_indicator_signal:emaCrossDown:ema_sig ...
throttle_s 0
created_at 2026-04-17T20:44:04.423656+00:00
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