Delete row sig_be9d08f1d83e from signals

id sig_be9d08f1d83e
event_id evt_9339831db511
watcher_id NULL
signal_type technical_indicator_signal
value {"bars":600,"confidence":0.7999720 ...
threshold NULL
direction NULL
severity high
window NULL
source technical_analyzer
reason_trace {"cutoff_iso":"2026-04-17T20:11:54Z ...
dedupe_key ta:technical_indicator_signal:bigMoveUp:big_move:Z ...
throttle_s 0
created_at 2026-04-20T20:11:54.360053+00:00
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