Delete row sig_d33756b76a33 from signals

id sig_d33756b76a33
event_id evt_a81b6109d4d9
watcher_id NULL
signal_type opportunity_research_snapshot
value {"as_of":"2026-04-11T13:16:53.180075+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source opportunity_research_ingestor
reason_trace {}
dedupe_key opportunity_research_snapshot:1b83860062e6670c
throttle_s 0
created_at 2026-04-11T13:16:53.180075+00:00
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