Delete row sig_26cf6bc7b949 from signals

id sig_26cf6bc7b949
event_id evt_d6fe3b9ba378
watcher_id NULL
signal_type opportunity_research_snapshot
value {"as_of":"2026-04-19T05:12:51.059910+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source opportunity_research_ingestor
reason_trace {}
dedupe_key opportunity_research_snapshot:aa62002d232ccf0f
throttle_s 0
created_at 2026-04-19T05:12:51.059910+00:00
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