Delete row sig_ce5ceffbe139 from signals

id sig_ce5ceffbe139
event_id evt_537c0bf62c68
watcher_id NULL
signal_type opportunity_research_snapshot
value {"as_of":"2026-04-12T06:09:14.083823+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source opportunity_research_ingestor
reason_trace {}
dedupe_key opportunity_research_snapshot:1320ecf61b51954b
throttle_s 0
created_at 2026-04-12T06:09:14.083823+00:00
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