Delete row sig_4917b5282e6b from signals

id sig_4917b5282e6b
event_id evt_e523e9ae2443
watcher_id NULL
signal_type technical_indicator_signal
value {"bars":600,"confidence":0.6640522 ...
threshold NULL
direction NULL
severity medium
window NULL
source technical_analyzer
reason_trace {"cutoff_iso":"2026-04-07T20:45:16Z ...
dedupe_key ta:technical_indicator_signal:emaCrossDown:ema_sig ...
throttle_s 0
created_at 2026-04-10T20:45:16.804857+00:00
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