Delete row sig_e22f5463074d from signals

id sig_e22f5463074d
event_id evt_ccfb8e50597d
watcher_id NULL
signal_type opportunity_research_snapshot
value {"as_of":"2026-04-18T17:13:15.164528+0 ...
threshold NULL
direction NULL
severity NULL
window NULL
source opportunity_research_ingestor
reason_trace {}
dedupe_key opportunity_research_snapshot:0a7abb619b9fe42a
throttle_s 0
created_at 2026-04-18T17:13:15.164528+00:00
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