Delete row sig_e89d96e22d03 from signals

id sig_e89d96e22d03
event_id evt_09f07c80aeed
watcher_id NULL
signal_type technical_indicator_signal
value {"bars":600,"confidence":0.5210886 ...
threshold NULL
direction NULL
severity medium
window NULL
source technical_analyzer
reason_trace {"cutoff_iso":"2026-04-14T21:04:13Z ...
dedupe_key ta:technical_indicator_signal:priceBelowEma12:ema_ ...
throttle_s 0
created_at 2026-04-17T21:04:13.196401+00:00
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