Delete row sig_9a1b0246b8e9 from signals

id sig_9a1b0246b8e9
event_id evt_7c51ea89d10a
watcher_id NULL
signal_type technical_indicator_signal
value {"bars":600,"confidence":0.6306515 ...
threshold NULL
direction NULL
severity medium
window NULL
source technical_analyzer
reason_trace {"cutoff_iso":"2026-04-13T20:07:03Z ...
dedupe_key ta:technical_indicator_signal:priceAboveEma12:ema_ ...
throttle_s 0
created_at 2026-04-16T20:07:03.367072+00:00
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