Delete row sig_2fc889facb91 from signals

id sig_2fc889facb91
event_id evt_6712fd1f74f9
watcher_id NULL
signal_type opportunity_research_snapshot
value {"as_of":"2026-04-12T15:55:38.032283+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source opportunity_research_ingestor
reason_trace {}
dedupe_key opportunity_research_snapshot:74c01a7ced024f56
throttle_s 0
created_at 2026-04-12T15:55:38.032283+00:00
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