Delete row sig_1062fef677d9 from signals

id sig_1062fef677d9
event_id evt_1fc13079dc6f
watcher_id NULL
signal_type technical_indicator_signal
value {"bars":600,"confidence":0.6323396 ...
threshold NULL
direction NULL
severity medium
window NULL
source technical_analyzer
reason_trace {"cutoff_iso":"2026-04-06T20:07:55Z ...
dedupe_key ta:technical_indicator_signal:emaCrossUp:ema_signa ...
throttle_s 0
created_at 2026-04-09T20:07:55.116892+00:00
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