Delete row sig_b14410d81061 from signals

id sig_b14410d81061
event_id evt_e9f2f6ddbf66
watcher_id NULL
signal_type technical_indicator_signal
value {"bars":600,"confidence":0.8490866 ...
threshold NULL
direction NULL
severity high
window NULL
source technical_analyzer
reason_trace {"cutoff_iso":"2026-04-07T20:05:08Z ...
dedupe_key ta:technical_indicator_signal:bigMoveUp:big_move:S ...
throttle_s 0
created_at 2026-04-10T20:05:08.385700+00:00
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