Delete row sig_9005489c1f26 from signals

id sig_9005489c1f26
event_id evt_954a29eaf889
watcher_id NULL
signal_type opportunity_research_snapshot
value {"as_of":"2026-04-14T18:28:20.003990+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source opportunity_research_ingestor
reason_trace {}
dedupe_key opportunity_research_snapshot:8a06d1b16d55c720
throttle_s 0
created_at 2026-04-14T18:28:20.003990+00:00
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