Delete row sig_f5dd4b800ff9 from signals

id sig_f5dd4b800ff9
event_id evt_700c9d6c4f54
watcher_id NULL
signal_type opportunity_research_snapshot
value {"as_of":"2026-04-17T19:23:11.516123+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source opportunity_research_ingestor
reason_trace {}
dedupe_key opportunity_research_snapshot:849d8961dfc98a17
throttle_s 0
created_at 2026-04-17T19:23:11.516123+00:00
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