Delete row sig_5a796284f1bf from signals

id sig_5a796284f1bf
event_id evt_9500b6dcfd79
watcher_id NULL
signal_type opportunity_research_snapshot
value {"as_of":"2026-04-20T21:14:44.609240+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source opportunity_research_ingestor
reason_trace {}
dedupe_key opportunity_research_snapshot:9a2a17aa87bb8fea
throttle_s 0
created_at 2026-04-20T21:14:44.609240+00:00
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