Delete row sig_2cb6804f1a77 from signals

id sig_2cb6804f1a77
event_id evt_5a2bc74fb1d5
watcher_id NULL
signal_type opportunity_research_snapshot
value {"as_of":"2026-04-11T07:17:43.935401+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source opportunity_research_ingestor
reason_trace {}
dedupe_key opportunity_research_snapshot:bfd7cfcb7f9b937a
throttle_s 0
created_at 2026-04-11T07:17:43.935401+00:00
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